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Conserved domains on  [gi|4504347|ref|NP_000549|]
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hemoglobin subunit alpha [Homo sapiens]

Protein Classification

hemoglobin alpha subunit family protein( domain architecture ID 10172381)

hemoglobin alpha subunit family protein is either one of alpha, zeta, mu, theta, or related hemoglobin (Hb) subunits. Hb is the oxygen transport protein of erythrocytes. It is an allosterically modulated heterotetramer. Hemoglobin A (HbA) is the most common Hb in adult humans, and is formed from two alpha-chains and two beta-chains (alpha2beta2). An equilibrium exists between deoxygenated/unliganded/T(tense state) Hb having low oxygen affinity, and oxygenated /liganded/R(relaxed state) Hb having a high oxygen affinity. Various endogenous heterotropic effectors bind Hb to modulate its oxygen affinity and cooperative behavior, e.g. hydrogen ions, chloride ions, carbon dioxide and 2,3-bisphosphoglycerate. Hb is also an allosterically regulated nitrite reductase; the plasma nitrite anion may be activated by hemoglobin in areas of hypoxia to bring about vasodilation.

Graphical summary

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List of domain hits

 Name Accession Description Interval E-value
Hb-alpha-like cd08927
Hemoglobin alpha, zeta, mu, theta, and related Hb subunits; Hb is the oxygen transport protein ...
 3-142 9.02e-85

Hemoglobin alpha, zeta, mu, theta, and related Hb subunits; Hb is the oxygen transport protein of erythrocytes. It is an allosterically modulated heterotetramer. Hemoglobin A (HbA) is the most common Hb in adult humans, and is formed from two alpha-chains and two beta-chains (alpha2beta2). An equilibrium exists between deoxygenated/unliganded/T(tense state) Hb having low oxygen affinity, and oxygenated /liganded/R(relaxed state) Hb having a high oxygen affinity. Various endogenous heterotropic effectors bind Hb to modulate its oxygen affinity and cooperative behavior, e.g. hydrogen ions, chloride ions, carbon dioxide and 2,3-bisphosphoglycerate. Hb is also an allosterically regulated nitrite reductase; the plasma nitrite anion may be activated by hemoglobin in areas of hypoxia to bring about vasodilation. Other Hb types are: HbA2 (alpha2delta2) which in normal individuals, is naturally expressed at a low level; Hb Portland-1 (zeta2gamma2), Hb Gower-1 (zeta2epsilon2), and Hb Gower-2 (alpha2epsilon2), which are Hbs present during the embryonic period; and fetal hemoglobin (HbF, alpha2gamma2), the primary hemoglobin throughout most of gestation. These Hbs types have differences in O2 affinity and in their interactions with allosteric effectors.


:

Pssm-ID: 381263  Cd Length: 140  Bit Score: 244.02  E-value: 9.02e-85
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    3 LSPADKTNVKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHFDLSHGSAQVKGHGKKVADALTNAVAHVDDMPNALS 82
Cdd:cd08927   1 LSAADKALIKALWGKIAGHAEAIGAEALARMFLSFPQTKTYFPHFDLSAGSAQVKAHGKKVMDALGDAVKHLDDLPGALS 80

                        90       100       110       120       130       140
                ....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347   83 ALSDLHAHKLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVLTSKYR 142
Cdd:cd08927  81 KLSDLHAYKLRVDPVNFKLLSHCILVTLAAHLPEDFTPEVHAALDKFLAAVSHVLSSKYR 140
 
Name Accession Description Interval E-value
Hb-alpha-like cd08927
Hemoglobin alpha, zeta, mu, theta, and related Hb subunits; Hb is the oxygen transport protein ...
 3-142 9.02e-85

Hemoglobin alpha, zeta, mu, theta, and related Hb subunits; Hb is the oxygen transport protein of erythrocytes. It is an allosterically modulated heterotetramer. Hemoglobin A (HbA) is the most common Hb in adult humans, and is formed from two alpha-chains and two beta-chains (alpha2beta2). An equilibrium exists between deoxygenated/unliganded/T(tense state) Hb having low oxygen affinity, and oxygenated /liganded/R(relaxed state) Hb having a high oxygen affinity. Various endogenous heterotropic effectors bind Hb to modulate its oxygen affinity and cooperative behavior, e.g. hydrogen ions, chloride ions, carbon dioxide and 2,3-bisphosphoglycerate. Hb is also an allosterically regulated nitrite reductase; the plasma nitrite anion may be activated by hemoglobin in areas of hypoxia to bring about vasodilation. Other Hb types are: HbA2 (alpha2delta2) which in normal individuals, is naturally expressed at a low level; Hb Portland-1 (zeta2gamma2), Hb Gower-1 (zeta2epsilon2), and Hb Gower-2 (alpha2epsilon2), which are Hbs present during the embryonic period; and fetal hemoglobin (HbF, alpha2gamma2), the primary hemoglobin throughout most of gestation. These Hbs types have differences in O2 affinity and in their interactions with allosteric effectors.


Pssm-ID: 381263  Cd Length: 140  Bit Score: 244.02  E-value: 9.02e-85
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    3 LSPADKTNVKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHFDLSHGSAQVKGHGKKVADALTNAVAHVDDMPNALS 82
Cdd:cd08927   1 LSAADKALIKALWGKIAGHAEAIGAEALARMFLSFPQTKTYFPHFDLSAGSAQVKAHGKKVMDALGDAVKHLDDLPGALS 80

                        90       100       110       120       130       140
                ....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347   83 ALSDLHAHKLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVLTSKYR 142
Cdd:cd08927  81 KLSDLHAYKLRVDPVNFKLLSHCILVTLAAHLPEDFTPEVHAALDKFLAAVSHVLSSKYR 140
Globin pfam00042
Globin;
27-137 8.31e-32

Globin;


Pssm-ID: 459646 [Multi-domain]  Cd Length: 117  Bit Score: 109.30  E-value: 8.31e-32
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347     27 AEALERMFLSFPTTKTYFPHF----DLSHGSAQVKGHGKKVADALTNAVAHVDDMPN---ALSALSDLHAHKLRVDPVNF 99
Cdd:pfam00042   1 AEILARLFTAYPDTKAYFPRFeksaDDLKGSPKFKAHGKKVLAALGEAVKHLDDLAAlnaALKKLGARHKEKRGVDPANF 80

                          90       100       110
                  ....*....|....*....|....*....|....*...
gi 4504347    100 KLLSHCLLVTLAAHLPaEFTPAVHASLDKFLASVSTVL 137
Cdd:pfam00042  81 KLFGEALLVVLAEHLG-EFTPETKAAWDKALDVIAAAL 117
Hmp COG1017
Hemoglobin-like flavoprotein [Energy production and conversion];
3-137 5.29e-13

Hemoglobin-like flavoprotein [Energy production and conversion];


Pssm-ID: 440640 [Multi-domain]  Cd Length: 135  Bit Score: 61.71  E-value: 5.29e-13
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    3 LSPADKTNVKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHfdlsHGSAQvkghGKKVADALTNAVAHVDDMPNALS 82
Cdd:COG1017   1 LSPETIALVKASFPLVAPHGEEITARFYERLFELHPELRPLFNG----DMGEQ----RKALAAALAAYARNLDNLEALLP 72

                        90       100       110       120       130
                ....*....|....*....|....*....|....*....|....*....|....*..
gi 4504347   83 ALSDL-HAH-KLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVL 137
Cdd:COG1017  73 ALERLgRKHvSYGVKPEHYPIVGEALLAALREVLGDAWTPEVAAAWAEAYGLLADVM 129
 
Name Accession Description Interval E-value
Hb-alpha-like cd08927
Hemoglobin alpha, zeta, mu, theta, and related Hb subunits; Hb is the oxygen transport protein ...
 3-142 9.02e-85

Hemoglobin alpha, zeta, mu, theta, and related Hb subunits; Hb is the oxygen transport protein of erythrocytes. It is an allosterically modulated heterotetramer. Hemoglobin A (HbA) is the most common Hb in adult humans, and is formed from two alpha-chains and two beta-chains (alpha2beta2). An equilibrium exists between deoxygenated/unliganded/T(tense state) Hb having low oxygen affinity, and oxygenated /liganded/R(relaxed state) Hb having a high oxygen affinity. Various endogenous heterotropic effectors bind Hb to modulate its oxygen affinity and cooperative behavior, e.g. hydrogen ions, chloride ions, carbon dioxide and 2,3-bisphosphoglycerate. Hb is also an allosterically regulated nitrite reductase; the plasma nitrite anion may be activated by hemoglobin in areas of hypoxia to bring about vasodilation. Other Hb types are: HbA2 (alpha2delta2) which in normal individuals, is naturally expressed at a low level; Hb Portland-1 (zeta2gamma2), Hb Gower-1 (zeta2epsilon2), and Hb Gower-2 (alpha2epsilon2), which are Hbs present during the embryonic period; and fetal hemoglobin (HbF, alpha2gamma2), the primary hemoglobin throughout most of gestation. These Hbs types have differences in O2 affinity and in their interactions with allosteric effectors.


Pssm-ID: 381263  Cd Length: 140  Bit Score: 244.02  E-value: 9.02e-85
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    3 LSPADKTNVKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHFDLSHGSAQVKGHGKKVADALTNAVAHVDDMPNALS 82
Cdd:cd08927   1 LSAADKALIKALWGKIAGHAEAIGAEALARMFLSFPQTKTYFPHFDLSAGSAQVKAHGKKVMDALGDAVKHLDDLPGALS 80

                        90       100       110       120       130       140
                ....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347   83 ALSDLHAHKLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVLTSKYR 142
Cdd:cd08927  81 KLSDLHAYKLRVDPVNFKLLSHCILVTLAAHLPEDFTPEVHAALDKFLAAVSHVLSSKYR 140
Hb cd14765
Hemoglobins; Hb is the oxygen transport protein of erythrocytes. It is an allosterically ...
 7-138 9.06e-62

Hemoglobins; Hb is the oxygen transport protein of erythrocytes. It is an allosterically modulated heterotetramer. Hemoglobin A (HbA) is the most common Hb in adult humans, and is formed from two alpha-chains and two beta-chains (alpha2beta2). An equilibrium exists between deoxygenated/unliganded/T(tense state) Hb having low oxygen affinity, and oxygenated /liganded/R(relaxed state) Hb having a high oxygen affinity. Various endogenous heterotropic effectors bind Hb to modulate its oxygen affinity and cooperative behavior, e.g. hydrogen ions, chloride ions, carbon dioxide and 2,3-bisphosphoglycerate. Hb is also an allosterically regulated nitrite reductase; the plasma nitrite anion may be activated by hemoglobin in areas of hypoxia to bring about vasodilation. Other Hb types are: HbA2 (alpha2delta2) which, in normal individuals, is naturally expressed at a low level; Hb Portland-1 (zeta2gamma2), Hb Gower-1 (zeta2epsilon2), and Hb Gower-2 (alpha2epsilon2), which are Hbs present during the embryonic period; and fetal hemoglobin (HbF, alpha2gamma2), the primary Hb throughout most of gestation. These Hb types have differences in O2 affinity and in their interactions with allosteric effectors.


Pssm-ID: 381278  Cd Length: 131  Bit Score: 185.63  E-value: 9.06e-62
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    7 DKTNVKAAWGKVgaHAGEYGAEALERMFLSFPTTKTYFPHFDLSH-GSAQVKGHGKKVADALTNAVAHVDDMPNALSALS 85
Cdd:cd14765   1 EKSTIKALWGKV--NVEEYGAEALARLFVVYPWTKRYFPKFDDSSsGNPKVKAHGKKVLGALGDAVKHLDDLKNTFSDLS 78

                        90       100       110       120       130
                ....*....|....*....|....*....|....*....|....*....|...
gi 4504347   86 DLHAHKLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVLT 138
Cdd:cd14765  79 ELHADKLHVDPENFKLLSDCLIVVLAAHLGKEFTPEVHAAWDKFLAVVAAALS 131
Hb-beta-like cd08925
Hemoglobin beta, gamma, delta, epsilon, and related Hb subunits; Hb is the oxygen transport ...
 7-141 1.38e-41

Hemoglobin beta, gamma, delta, epsilon, and related Hb subunits; Hb is the oxygen transport protein of erythrocytes. It is an allosterically modulated heterotetramer. Hemoglobin A (HbA) is the most common Hb in adult humans, and is formed from two alpha-chains and two beta-chains (alpha2beta2). An equilibrium exists between deoxygenated/unliganded/T(tense state) Hb having low oxygen affinity, and oxygenated /liganded/R(relaxed state) Hb having a high oxygen affinity. Various endogenous heterotropic effectors bind Hb to modulate its oxygen affinity and cooperative behavior, e.g. hydrogen ions, chloride ions, carbon dioxide and 2,3-bisphosphoglycerate. Hb is also an allosterically regulated nitrite reductase; the plasma nitrite anion may be activated by hemoglobin in areas of hypoxia to bring about vasodilation. Other Hb types are: HbA2 (alpha2delta2) which in normal individuals, is naturally expressed at a low level; Hb Portland-1 (zeta2gamma2), Hb Gower-1 (zeta2epsilon2), and Hb Gower-2 (alpha2epsilon2), which are Hbs present during the embryonic period; and fetal hemoglobin (HbF, alpha2gamma2), the primary hemoglobin throughout most of gestation. These Hbs types have differences in O2 affinity and in their interactions with allosteric effectors.


Pssm-ID: 381262  Cd Length: 139  Bit Score: 135.07  E-value: 1.38e-41
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    7 DKTNVKAAWGKVGAHagEYGAEALERMFLSFPTTKTYFPHF-DLSH-----GSAQVKGHGKKVADALTNAVAHVDDMPNA 80
Cdd:cd08925   1 EKAAITAVWGKVDVD--EVGAEALARLLIVYPWTQRYFSSFgDLSSaaaiaGNPKVAAHGKKVLGALGEAIKHLDDIKAT 78

                        90       100       110       120       130       140
                ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 4504347   81 LSALSDLHAHKLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVLTSKY 141
Cdd:cd08925  79 FADLSEKHSEKLHVDPENFKLLGDCLVVVLAAHFGKEFTPEVQAAWEKFFAVVVDALSKGY 139
Globin pfam00042
Globin;
27-137 8.31e-32

Globin;


Pssm-ID: 459646 [Multi-domain]  Cd Length: 117  Bit Score: 109.30  E-value: 8.31e-32
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347     27 AEALERMFLSFPTTKTYFPHF----DLSHGSAQVKGHGKKVADALTNAVAHVDDMPN---ALSALSDLHAHKLRVDPVNF 99
Cdd:pfam00042   1 AEILARLFTAYPDTKAYFPRFeksaDDLKGSPKFKAHGKKVLAALGEAVKHLDDLAAlnaALKKLGARHKEKRGVDPANF 80

                          90       100       110
                  ....*....|....*....|....*....|....*...
gi 4504347    100 KLLSHCLLVTLAAHLPaEFTPAVHASLDKFLASVSTVL 137
Cdd:pfam00042  81 KLFGEALLVVLAEHLG-EFTPETKAAWDKALDVIAAAL 117
Cygb cd08924
Cytoglobin and related globins; Cygb is a hexacoordinated heme-containing protein, able to ...
 3-142 1.04e-22

Cytoglobin and related globins; Cygb is a hexacoordinated heme-containing protein, able to bind O2, NO and carbon monoxide. It has both nitric oxide dioxygenase and lipid peroxidase activities, and potentially participates in the maintenance of normal phenotype by implementing a homeostatic effect, to counteract stress conditions imposed on a cell. Cygb is implicated in multiple human pathologies: it is up-regulated in fibrosis and neurodegenerative disorders, and down-regulated in multiple cancer types, and may have a tumor suppressor role. It is expressed ubiquitously across a broad range of vertebrate organs including liver, heart, brain, lung, retina, and gut. In the human brain, it was detected at high levels in the habenula, hypothalamus, thalamus, hippocampus and pontine tegmental nuclei, detected at a low level in the cerebral cortex, and undetected in the cerebellar cortex.


Pssm-ID: 271275  Cd Length: 153  Bit Score: 87.20  E-value: 1.04e-22
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    3 LSPADKTNVKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHF-DLS-----HGSAQVKGHGKKVADALTNAVAHVDD 76
Cdd:cd08924   1 LTEAERKVIQDTWARVYANCEDVGVAILVRFFVNFPSAKQYFSQFkHMEdplemERSSQLRKHARRVMGALNTVVENLHD 80

                        90       100       110       120       130       140
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 4504347   77 ---MPNALSALSDLHAHKLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVLTSKYR 142
Cdd:cd08924  81 pdkVSSVLALVGKAHALKHKVEPVYFKILSGVILEVLAEEFAQDFTPEVQSAWSKLRGLIYSHVTAAYK 149
Mb-like cd01040
myoglobin-like; M family globin domain; This family includes chimeric (FHbs/flavohemoglobins) ...
 11-137 1.01e-20

myoglobin-like; M family globin domain; This family includes chimeric (FHbs/flavohemoglobins) and single-domain globins: FHbs, Ngbs/neuroglobins, Cygb/cytoglobins, GbE/avian eye specific globin E, GbX/globin X, amphibian GbY/globin Y, Mb/myoglobin, HbA/hemoglobin-alpha, HbB/hemoglobin-beta, SDgbs/single-domain globins related to FHbs, and Adgb/androglobin. The M family exhibits the canonical secondary structure of hemoglobins, a 3-over-3 alpha-helical sandwich structure (3/3 Mb-fold), built by eight alpha-helical segments (named A through H). In Adgbs, the globin domain is split into two: helices C-H are followed by helices A-B and the two parts are separated by the IQ motif. Although rearranged, the globin domain of most Adgbs contains a number of conserved residues which play critical roles in heme-coordination and gas ligand binding. Adgbs have been omitted from this A-H helix cd.


Pssm-ID: 381254  Cd Length: 133  Bit Score: 81.73  E-value: 1.01e-20
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347   11 VKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHFDLSH----GSAQVKGHGKKVADALTNAVAHVDDMPNALSALSD 86
Cdd:cd01040   1 VKSSWARVKKDKEEFGVAIFLRLFEANPELKKLFPKFAGVDldlkGSPEFKAHAKRVVGALDSLIDNLDDPEALDALLRK 80

                        90       100       110       120       130
                ....*....|....*....|....*....|....*....|....*....|...
gi 4504347   87 LHA-HKLR-VDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVL 137
Cdd:cd01040  81 LGKrHKRRgVTPEHFEVFGEALLETLEEVLGEAFTPEVEAAWRKLLDYIANAI 133
Mb cd08926
Animal Myoglobins; Myoglobin (Mb) is a monomeric pentacoordinate heme-bound globin protein ...
 6-142 2.39e-13

Animal Myoglobins; Myoglobin (Mb) is a monomeric pentacoordinate heme-bound globin protein whose expression has long been considered limited to cardiomyocytes and striated skeletal muscle cell, however it has recently been found localized in a wide variety of tissues including smooth muscle cells. As a physiological catalyst, it can modulate reactive oxygen species levels, facilitate oxygen diffusion within the cell, and scavenge or generate NO depending on oxygen tensions within the cell. Through its NO dioxygenase and nitrite reductase activities, Mb regulates mitochondrial function in energy-demanding tissues.


Pssm-ID: 271277  Cd Length: 148  Bit Score: 62.86  E-value: 2.39e-13
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    6 ADKTNVKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHFD-LSHG----SAQVKGHGKKVADALTNAVAHVDDMPNA 80
Cdd:cd08926   1 ADWDLVLKVWAKVEADLTGIGQEVLLRLFKEHPETQEHFPKFKgISQDdlksNEDLKKHGVTVLTALGEILKQKGSHEAE 80

                        90       100       110       120       130       140
                ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 4504347   81 LSALSDLHAHKLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVLTSKYR 142
Cdd:cd08926  81 LKPLAQTHATKHKIPPKYFELITEIIVKVLAEKHPSEMGAPAQAAFSKAFELICSDIEANYK 142
Hmp COG1017
Hemoglobin-like flavoprotein [Energy production and conversion];
3-137 5.29e-13

Hemoglobin-like flavoprotein [Energy production and conversion];


Pssm-ID: 440640 [Multi-domain]  Cd Length: 135  Bit Score: 61.71  E-value: 5.29e-13
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    3 LSPADKTNVKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHfdlsHGSAQvkghGKKVADALTNAVAHVDDMPNALS 82
Cdd:COG1017   1 LSPETIALVKASFPLVAPHGEEITARFYERLFELHPELRPLFNG----DMGEQ----RKALAAALAAYARNLDNLEALLP 72

                        90       100       110       120       130
                ....*....|....*....|....*....|....*....|....*....|....*..
gi 4504347   83 ALSDL-HAH-KLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVL 137
Cdd:COG1017  73 ALERLgRKHvSYGVKPEHYPIVGEALLAALREVLGDAWTPEVAAAWAEAYGLLADVM 129
HGbI-like cd12131
Hell's gate globin I (HGbI) from Methylacidophilum infernorum and related proteins; HGbI is a ...
 7-136 6.95e-12

Hell's gate globin I (HGbI) from Methylacidophilum infernorum and related proteins; HGbI is a single-domain heme-containing protein isolated from Methylacidiphilum infernorum, an aerobic acidophilic and thermophilic methanotroph. M. infernorum grows optimally at pH 2.0 and 60C and its home is New Zealand's Hell's Gate geothermal park. The physiological role of HGbI has yet to be determined. It has an extremely strong resistance to auto-oxidation, and has fast oxygen-binding/slow release characteristics. Its CO on-rate is comparable to the O2 on-rate, and it is able to bind acetate with high affinity in the ferric state. The coordination of the heme iron changes in the ferrous form from pentacoordinate at low pH to predominantly hexacoordinate at high pH; in the ferric form, it is predominantly hexacoordinate at all pH.


Pssm-ID: 381269 [Multi-domain]  Cd Length: 128  Bit Score: 58.33  E-value: 6.95e-12
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    7 DKTNVKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHFDLshgsaqvKGHGKKVADALTNAVAHVDDMPNALSALSD 86
Cdd:cd12131   1 QIELVQQSFAKVEPIADEAAALFYERLFELDPELKPLFKGTDM-------EEQGRKLMAMLVLVVKGLDDLEALLPALQD 73

                        90       100       110       120       130
                ....*....|....*....|....*....|....*....|....*....|..
gi 4504347   87 LHA-H-KLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTV 136
Cdd:cd12131  74 LGRrHvKYGVKPEHYPLVGEALLWTLEEGLGDEWTPEVKQAWTDAYGILAGT 125
Mb-like_oxidoreductase cd19753
Globin domain of uncharacterized oxidoreductases containing a FAD/NADH binding domain; This ...
 11-136 1.87e-04

Globin domain of uncharacterized oxidoreductases containing a FAD/NADH binding domain; This subfamily is composed of uncharacterized proteins containing an N-terminal myoglobin-like (M family globin) domain and a C-terminal oxygenase reductase FAD/NADH binding domain belonging to the ferredoxin reductase (FNR) family and is usually part of multi-component bacterial oxygenases which oxidize hydrocarbons using oxygen as the oxidant. The domain architecture of this subfamily is similar to flavohemoglobins, which function primarily as nitric oxide dioxygenases (NODs, EC 1.14.12.17), converting NO and O2 to inert NO3- (nitrate). They protect from nitrosative stress (the broad range of cellular toxicities caused by NO), and modulate NO signaling pathways. NO scavenging by flavoHb attenuates the expression of the nitrosative stress response, affects the swarming behavior of Escherichia coli, and maintains squid-Vibrio fischeri and Medicago truncatula-Sinorhizobium meliloti symbioses.


Pssm-ID: 381293 [Multi-domain]  Cd Length: 121  Bit Score: 38.76  E-value: 1.87e-04
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347   11 VKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPhfdlshgsAQVKGHGKKVADALTNAVAHVDDMPNALSALSDL--- 87
Cdd:cd19753   1 LRASLAAVEDGPDELARRFYARLFAEAPELRDLFP--------ADMDAQRDRLARALTHVVENLDDPDGLVPFLAQLgrd 72

                        90       100       110       120
                ....*....|....*....|....*....|....*....|....*....
gi 4504347   88 HAhKLRVDPVNFKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTV 136
Cdd:cd19753  73 HR-KYGVAPEHYPAVGAALLAALRHFAGEAWTPELEAAWAEAYTLIAGV 120
FHb-globin cd08922
Globin domain of flavohemoglobins (flavoHbs); FlavoHbs function primarily as nitric oxide ...
 31-124 8.65e-04

Globin domain of flavohemoglobins (flavoHbs); FlavoHbs function primarily as nitric oxide dioxygenases (NODs, EC 1.14.12.17), converting NO and O2 to inert NO3- (nitrate). They have an N-terminal globin domain and a C-terminal ferredoxin reductase-like NAD- and FAD-binding domain, and use the reducing power of cellular NAD(P)H to drive regeneration of the ferrous heme. They protect from nitrosative stress (the broad range of cellular toxicities caused by NO), and modulate NO signaling pathways. NO scavenging by flavoHb attenuates the expression of the nitrosative stress response, affects the swarming behavior of Escherichia coli, and maintains squid-Vibrio fischeri and Medicago truncatula-Sinorhizobium meliloti symbioses. FlavoHb expression affects Aspergillus nidulans sexual development and mycotoxin production, and Dictyostelium discoideum development. This family also includes some single-domain goblins (SDgbs).


Pssm-ID: 381260  Cd Length: 140  Bit Score: 37.17  E-value: 8.65e-04
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347   31 ERMFLSFPTTKTYFPHfdlshgSAQVKGH-GKKVADALTNAVAHVDDMPNALSALSDLhAHK---LRVDPVNFKLLSHCL 106
Cdd:cd08922  29 KRMFAEHPELKNLFNM------ANQASGRqPKALAAAVLAYAANIDNLEVLLPAVERI-AHKhvsLGVKPEHYPIVGEYL 101

                        90
                ....*....|....*...
gi 4504347  107 LVTLAAHLPAEFTPAVHA 124
Cdd:cd08922 102 LEAIKEVLGDAATPEVLD 119
Ngb cd08920
Neuroglobins; The Ngb described in this subfamily is a hexacoordinated heme globin chiefly ...
 3-138 5.19e-03

Neuroglobins; The Ngb described in this subfamily is a hexacoordinated heme globin chiefly expressed in neurons of the brain and retina. In the human brain, it is highly expressed in the hypothalamus, amygdala, and in the pontine tegmental nuclei. It affords protection of brain neurons from ischemia and hypoxia. In rats, it plays a role in the neuroprotection of limb ischemic preconditioning (LIP). It plays roles as: a sensor of oxygen levels; a store or reservoir for oxygen; a facilitator for oxygen transport; a regulator of ROS; and a scavenger of nitric oxide. It also functions in the protection against apoptosis and in sleep regulation. This subgroup contains Ngb from mammalian and non-mammalian vertebrates, including fish, amphibians and reptiles; the functionally pentacoordinated acoelomorph Symsagittifera roscoffensis Ngb does not belong to this subgroup.


Pssm-ID: 271272  Cd Length: 148  Bit Score: 35.20  E-value: 5.19e-03
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 4504347    3 LSPADKTNVKAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHFDLSHGSAQ-------VKGHGKKVADALTNAVAHVD 75
Cdd:cd08920   1 LSRPQKELIRESWRSVSRSPLEHGTVLFSRLFELEPDLLPLFQYNGRQFSSPQdclsspeFLDHIRKVMLVIDAAVSHLE 80

                        90       100       110       120       130       140
                ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 4504347   76 DMPNALSALSDLhAHKLRVDPVN---FKLLSHCLLVTLAAHLPAEFTPAVHASLDKFLASVSTVLT 138
Cdd:cd08920  81 DLSSLEEYLTSL-GRKHRAVGVKlesFSTVGESLLYMLESSLGPAFTPDTREAWSTLYGAVVQAMS 145
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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