mitochondrial intermediate peptidase (MIP) is an M3 family metallopeptidase that cleaves proteins, imported into the mitochondrion, to their mature size
Peptidase M3 mitochondrial intermediate peptidase (MIP); Peptidase M3 mitochondrial intermediate peptidase (MIP; EC 3.4.24.59) belongs to the widespread subfamily M3A, that shows similarity to Thimet oligopeptidase (TOP). It is one of three peptidases responsible for the proteolytic processing of both nuclear and mitochondrial encoded precursor polypeptides targeted to various subcompartments of the mitochondria. It cleaves intermediate-size proteins initially processed by mitochondrial processing peptidase (MPP) to yield a processing intermediate with a typical N-terminal octapeptide that is sequentially cleaved by MIP to mature-size protein. MIP cleaves precursor proteins of respiratory components, including subunits of the electron transport chain and tri-carboxylic acid cycle enzymes, and components of the mitochondrial genetic machinery, including ribosomal proteins, translation factors, and proteins required for mitochondrial DNA metabolism. It has been suggested that the human MIP (HMIP polypeptide (gene symbol MIPEP) may be one of the loci predicted to influence the clinical manifestations of Friedreich's ataxia (FRDA), an autosomal recessive neurodegenerative disease caused by the lack of human frataxin. These proteins are enriched in cysteine residues, two of which are highly conserved, suggesting their importance to stability as well as in formation of metal binding sites, thus playing a role in MIP activity.
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Pssm-ID: 341052 [Multi-domain] Cd Length: 613 Bit Score: 808.32 E-value: 0e+00
Peptidase M3 mitochondrial intermediate peptidase (MIP); Peptidase M3 mitochondrial intermediate peptidase (MIP; EC 3.4.24.59) belongs to the widespread subfamily M3A, that shows similarity to Thimet oligopeptidase (TOP). It is one of three peptidases responsible for the proteolytic processing of both nuclear and mitochondrial encoded precursor polypeptides targeted to various subcompartments of the mitochondria. It cleaves intermediate-size proteins initially processed by mitochondrial processing peptidase (MPP) to yield a processing intermediate with a typical N-terminal octapeptide that is sequentially cleaved by MIP to mature-size protein. MIP cleaves precursor proteins of respiratory components, including subunits of the electron transport chain and tri-carboxylic acid cycle enzymes, and components of the mitochondrial genetic machinery, including ribosomal proteins, translation factors, and proteins required for mitochondrial DNA metabolism. It has been suggested that the human MIP (HMIP polypeptide (gene symbol MIPEP) may be one of the loci predicted to influence the clinical manifestations of Friedreich's ataxia (FRDA), an autosomal recessive neurodegenerative disease caused by the lack of human frataxin. These proteins are enriched in cysteine residues, two of which are highly conserved, suggesting their importance to stability as well as in formation of metal binding sites, thus playing a role in MIP activity.
Pssm-ID: 341052 [Multi-domain] Cd Length: 613 Bit Score: 808.32 E-value: 0e+00
Peptidase family M3; This is the Thimet oligopeptidase family, large family of mammalian and ...
254-619
3.34e-131
Peptidase family M3; This is the Thimet oligopeptidase family, large family of mammalian and bacterial oligopeptidases that cleave medium sized peptides. The group also contains mitochondrial intermediate peptidase which is encoded by nuclear DNA but functions within the mitochondria to remove the leader sequence.
Pssm-ID: 396149 [Multi-domain] Cd Length: 450 Bit Score: 392.52 E-value: 3.34e-131
oligoendopeptidase F; This family represents the oligoendopeptidase F clade of the family of ...
493-537
8.83e-04
oligoendopeptidase F; This family represents the oligoendopeptidase F clade of the family of larger M3 or thimet (for thiol-dependent metallopeptidase) oligopeptidase family. Lactococcus lactis PepF hydrolyzed peptides of 7 and 17 amino acids with fairly broad specificity. The homolog of lactococcal PepF in group B Streptococcus was named PepB (, with the name difference reflecting a difference in species of origin rather activity; substrate profiles were quite similar. Differences in substrate specificity should be expected in other species. The gene is duplicated in Lactococcus lactis on the plasmid that bears it. A shortened second copy is found in Bacillus subtilis. [Protein fate, Degradation of proteins, peptides, and glycopeptides]
Pssm-ID: 272947 [Multi-domain] Cd Length: 591 Bit Score: 42.29 E-value: 8.83e-04
Peptidase M3 mitochondrial intermediate peptidase (MIP); Peptidase M3 mitochondrial intermediate peptidase (MIP; EC 3.4.24.59) belongs to the widespread subfamily M3A, that shows similarity to Thimet oligopeptidase (TOP). It is one of three peptidases responsible for the proteolytic processing of both nuclear and mitochondrial encoded precursor polypeptides targeted to various subcompartments of the mitochondria. It cleaves intermediate-size proteins initially processed by mitochondrial processing peptidase (MPP) to yield a processing intermediate with a typical N-terminal octapeptide that is sequentially cleaved by MIP to mature-size protein. MIP cleaves precursor proteins of respiratory components, including subunits of the electron transport chain and tri-carboxylic acid cycle enzymes, and components of the mitochondrial genetic machinery, including ribosomal proteins, translation factors, and proteins required for mitochondrial DNA metabolism. It has been suggested that the human MIP (HMIP polypeptide (gene symbol MIPEP) may be one of the loci predicted to influence the clinical manifestations of Friedreich's ataxia (FRDA), an autosomal recessive neurodegenerative disease caused by the lack of human frataxin. These proteins are enriched in cysteine residues, two of which are highly conserved, suggesting their importance to stability as well as in formation of metal binding sites, thus playing a role in MIP activity.
Pssm-ID: 341052 [Multi-domain] Cd Length: 613 Bit Score: 808.32 E-value: 0e+00
Peptidase M3A family includes thimet oligopeptidase, dipeptidyl carboxypeptidase and ...
74-619
0e+00
Peptidase M3A family includes thimet oligopeptidase, dipeptidyl carboxypeptidase and mitochondrial intermediate peptidase; The M3-like family also called neurolysin-like family, is part of the "zincins" metallopeptidases, and includes M3, M2 and M32 families of metallopeptidases. The M3 family is subdivided into two subfamilies: the widespread M3A, represented by this CD, which comprises a number of high-molecular mass endo- and exopeptidases from bacteria, archaea, protozoa, fungi, plants and animals, and the small M3B, whose members are enzymes primarily from bacteria. Well-known mammalian/eukaryotic M3A endopeptidases are the thimet oligopeptidase (TOP; endopeptidase 3.4.24.15), neurolysin (alias endopeptidase 3.4.24.16), and the mitochondrial intermediate peptidase. The first two are intracellular oligopeptidases, which act only on relatively short substrates of less than 20 amino acid residues, while the latter cleaves N-terminal octapeptides from proteins during their import into the mitochondria. The M3A subfamily also contains several bacterial endopeptidases, called oligopeptidases A, as well as a large number of bacterial carboxypeptidases, called dipeptidyl peptidases (Dcp; Dcp II; peptidyl dipeptidase; EC 3.4.15.5). The peptidases in the M3 family contain the HEXXH motif that forms part of the active site in conjunction with a C-terminally-located Glutamic acid (Glu) residue. A single zinc ion is ligated by the side-chains of the two Histidine (His) residues, and the more C-terminal Glu. Most of the peptidases are synthesized without signal peptides or propeptides, and function intracellularly.
Pssm-ID: 341068 [Multi-domain] Cd Length: 587 Bit Score: 795.60 E-value: 0e+00
Peptidase family M3; This is the Thimet oligopeptidase family, large family of mammalian and ...
254-619
3.34e-131
Peptidase family M3; This is the Thimet oligopeptidase family, large family of mammalian and bacterial oligopeptidases that cleave medium sized peptides. The group also contains mitochondrial intermediate peptidase which is encoded by nuclear DNA but functions within the mitochondria to remove the leader sequence.
Pssm-ID: 396149 [Multi-domain] Cd Length: 450 Bit Score: 392.52 E-value: 3.34e-131
Peptidase M3 thimet oligopeptidase (TOP), also includes neurolysin; Peptidase M3 Thimet ...
82-614
1.27e-117
Peptidase M3 thimet oligopeptidase (TOP), also includes neurolysin; Peptidase M3 Thimet oligopeptidase (TOP; PZ-peptidase; endo-oligopeptidase A; endopeptidase 24.15; soluble metallo-endopeptidase; EC 3.4.24.15) family also includes neurolysin (endopeptidase 24.16, microsomal endopeptidase, mitochondrial oligopeptidase M, neurotensin endopeptidase, soluble angiotensin II-binding protein, thimet oligopeptidase II) which hydrolyzes oligopeptides such as neurotensin, bradykinin and dynorphin A. TOP and neurolysin are neuropeptidases expressed abundantly in the testis, but are also found in the liver, lung and kidney. They are involved in the metabolism of neuropeptides under 20 amino acid residues long and cleave most bioactive peptides at the same sites, but recognize different positions on some naturally occurring and synthetic peptides; they cleave at distinct sites on the 13-residue bioactive peptide neurotensin, which modulates central dopaminergic and cholinergic circuits. TOP has been shown to degrade peptides released by the proteasome, limiting the extent of antigen presentation by major histocompatibility complex class I molecules, and has been associated with amyloid protein precursor processing.
Pssm-ID: 341050 [Multi-domain] Cd Length: 642 Bit Score: 363.76 E-value: 1.27e-117
Peptidase family M3, dipeptidyl carboxypeptidase (DCP); Peptidase family M3 dipeptidyl ...
82-614
4.60e-91
Peptidase family M3, dipeptidyl carboxypeptidase (DCP); Peptidase family M3 dipeptidyl carboxypeptidase (DCP; Dcp II; peptidyl dipeptidase; EC 3.4.15.5). This metal-binding M3A family also includes oligopeptidase A (OpdA; EC 3.4.24.70). DCP cleaves dipeptides off the C-termini of various peptides and proteins, the smallest substrate being N-blocked tripeptides and unblocked tetrapeptides. DCP from Escherichia coli is inhibited by the anti-hypertensive drug captopril, an inhibitor of the mammalian angiotensin converting enzyme (ACE, also called peptidyl dipeptidase A). OpdA may play a specific role in the degradation of signal peptides after they are released from precursor forms of secreted proteins. It can also cleave N-acetyl-L-Ala. This family also includes Arabidopsis thaliana organellar oligopeptidase OOP (At5g65620), which plays a role in targeting peptide degradation in mitochondria and chloroplasts; it degrades peptide substrates that are between 8 to 23 amino acid residues, and shows a weak preference for hydrophobic residues (F/L) at the P1 position.
Pssm-ID: 341051 [Multi-domain] Cd Length: 653 Bit Score: 294.75 E-value: 4.60e-91
M3-like Peptidases, zincin metallopeptidases, include M2_ACE, M3A, M3B_PepF, and M32 families; ...
493-616
4.70e-07
M3-like Peptidases, zincin metallopeptidases, include M2_ACE, M3A, M3B_PepF, and M32 families; The peptidase M3-like family, also called neurolysin-like family, is part of the "zincin" metallopeptidases, and includes the M2, M3 and M32 families of metallopeptidases. The M2 angiotensin converting enzyme (ACE, EC 3.4.15.1) is a membrane-bound, zinc-dependent dipeptidase that catalyzes the conversion of the decapeptide angiotensin I to the potent vasopressor octapeptide angiotensin II. The M3 family is subdivided into two subfamilies: the widespread M3A, which comprises a number of high-molecular mass endo- and exopeptidases from bacteria, archaea, protozoa, fungi, plants and animals, and the small M3B, whose members are enzymes primarily from bacteria. Well-known mammalian/eukaryotic M3A endopeptidases are the thimet oligopeptidase (TOP; endopeptidase 3.4.24.15), neurolysin (alias endopeptidase 3.4.24.16), and the mitochondrial intermediate peptidase. The first two are intracellular oligopeptidases, which act only on relatively short substrates of less than 20 amino acid residues, while the latter cleaves N-terminal octapeptides from proteins during their import into the mitochondria. The M3A subfamily also contains several bacterial endopeptidases, called oligopeptidases A, as well as a large number of bacterial carboxypeptidases, called dipeptidyl peptidases (Dcp; Dcp II; peptidyl dipeptidase; EC 3.4.15.5). M3B subfamily consists of oligopeptidase F (PepF) which hydrolyzes peptides containing 7-17 amino acid residues with fairly broad specificity. Peptidases in the M3 family contain the HEXXH motif that forms part of the active site in conjunction with a C-terminally-located Glutamic acid (Glu) residue. A single zinc ion is ligated by the side-chains of the two Histidine (His) residues, and the more C-terminal Glu. Most of the peptidases are synthesized without signal peptides or propeptides, and function intracellularly. There are similarities to the thermostable carboxypeptidases from Pyrococcus furiosus carboxypeptidase (PfuCP), and Thermus aquaticus (TaqCP), belonging to peptidase family M32. Little is known about function of this family, including carboxypeptidases Taq and Pfu.
Pssm-ID: 341049 [Multi-domain] Cd Length: 473 Bit Score: 52.81 E-value: 4.70e-07
Peptidase family M3B, oligopeptidase F (PepF); Peptidase family M3 oligopeptidase F ...
493-537
1.22e-06
Peptidase family M3B, oligopeptidase F (PepF); Peptidase family M3 oligopeptidase F (oligendopeptidase) is mostly bacterial and includes oligoendopeptidase F from Geobacillus stearothermophilus. This enzyme hydrolyzes peptides containing between 7 and 17 amino acids and may cleave proteins at Leu-Gly. The PepF gene is duplicated in Lactococcus lactis on the plasmid that bears it, while a shortened second copy is found in Bacillus subtilis. Most bacterial PepFs are cytoplasmic endopeptidases; however, the Bacillus amyloliquefaciens PepF oligopeptidase is a secreted protein and may facilitate the process of sporulation. Specifically, the yjbG gene encoding the homolog of the PepF1 and PepF2 oligoendopeptidases of Lactococcus lactis has been identified in Bacillus subtilis as an inhibitor of sporulation initiation when over-expressed from a multicopy plasmid.
Pssm-ID: 341069 [Multi-domain] Cd Length: 543 Bit Score: 51.32 E-value: 1.22e-06
oligoendopeptidase F; This family represents the oligoendopeptidase F clade of the family of ...
493-537
8.83e-04
oligoendopeptidase F; This family represents the oligoendopeptidase F clade of the family of larger M3 or thimet (for thiol-dependent metallopeptidase) oligopeptidase family. Lactococcus lactis PepF hydrolyzed peptides of 7 and 17 amino acids with fairly broad specificity. The homolog of lactococcal PepF in group B Streptococcus was named PepB (, with the name difference reflecting a difference in species of origin rather activity; substrate profiles were quite similar. Differences in substrate specificity should be expected in other species. The gene is duplicated in Lactococcus lactis on the plasmid that bears it. A shortened second copy is found in Bacillus subtilis. [Protein fate, Degradation of proteins, peptides, and glycopeptides]
Pssm-ID: 272947 [Multi-domain] Cd Length: 591 Bit Score: 42.29 E-value: 8.83e-04
oligoendopeptidase, M3 family; This family consists of probable oligoendopeptidases in the M3 ...
486-537
9.82e-04
oligoendopeptidase, M3 family; This family consists of probable oligoendopeptidases in the M3 family, related to lactococcal PepF and group B streptococcal PepB (TIGR00181) but in a distinct clade with considerable sequence differences. The likely substrate is small peptides and not whole proteins, as with PepF, but members are not characterized and the activity profile may differ. Several bacteria have both a member of this family and a member of the PepF family.
Pssm-ID: 274068 [Multi-domain] Cd Length: 549 Bit Score: 42.05 E-value: 9.82e-04
Peptidase family M3B, oligopeptidase F (PepF); Peptidase family M3B oligopeptidase F (PepF; ...
495-532
2.77e-03
Peptidase family M3B, oligopeptidase F (PepF); Peptidase family M3B oligopeptidase F (PepF; Pz-peptidase B; EC 3.4.24.-) is mostly bacterial and includes oligoendopeptidase F from Lactococcus lactis. This enzyme hydrolyzes peptides containing between 7 and 17 amino acids with fairly broad specificity. The PepF gene is duplicated in L. lactis on the plasmid that bears it, while a shortened second copy is found in Bacillus subtilis. Most bacterial PepFs are cytoplasmic endopeptidases; however, the Bacillus amyloliquefaciens PepF oligopeptidase is a secreted protein and may facilitate the process of sporulation. Specifically, the yjbG gene encoding the homolog of the PepF1 and PepF2 oligoendopeptidases of Lactococcus lactis has been identified in Bacillus subtilis as an inhibitor of sporulation initiation when over-expressed from a multicopy plasmid. This PepF family includes Streptococcus agalactiae PepB, a group B streptococcal oligopeptidase which has been shown to degrade a variety of bioactive peptides as well as the synthetic collagen-like substrate N-(3-[2-furyl]acryloyl)-Leu-Gly- Pro-Ala in vitro.
Pssm-ID: 341071 [Multi-domain] Cd Length: 560 Bit Score: 40.50 E-value: 2.77e-03
Peptidase family M3B, oligopeptidase F (PepF); Peptidase family M3B oligopeptidase F (PepF; ...
495-537
3.23e-03
Peptidase family M3B, oligopeptidase F (PepF); Peptidase family M3B oligopeptidase F (PepF; Pz-peptidase B; EC 3.4.24.-) is mostly bacterial and is similar to oligoendopeptidase F from Lactococcus lactis. This enzyme hydrolyzes peptides containing between 7 and 17 amino acids with fairly broad specificity. The PepF gene is duplicated in L. lactis on the plasmid that bears it, while a shortened second copy is found in Bacillus subtilis. Most bacterial PepFs are cytoplasmic endopeptidases; however, the Bacillus amyloliquefaciens PepF oligopeptidase is a secreted protein and may facilitate the process of sporulation. Specifically, the yjbG gene encoding the homolog of the PepF1 and PepF2 oligoendopeptidases of Lactococcus lactis has been identified in Bacillus subtilis as an inhibitor of sporulation initiation when over-expressed from a multicopy plasmid.
Pssm-ID: 341073 [Multi-domain] Cd Length: 532 Bit Score: 40.60 E-value: 3.23e-03
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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