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Resources for Genetics Professionals — Genetic Disorders Associated with Founder Variants Common in the Druze Population

, MD and , PhD.

Author Information and Affiliations

Initial Posting: ; Last Revision: September 28, 2023.

Estimated reading time: 9 minutes

A founder variant is a pathogenic variant observed at high frequency in a specific population due to the presence of the variant in a single ancestor or small number of ancestors. The presence of a founder variant can affect the approach to molecular genetic testing. When one or more founder variants account for a large percentage of all pathogenic variants found in a population, testing for the founder variant(s) may be performed first.

The table below includes common founder variants – here defined as three or fewer variants that account for >50% of the pathogenic variants identified in a single gene in individuals of a specific ancestry – in individuals of Druze ancestry. Note: (1) Pathogenic variants that are common worldwide due to a DNA sequence hot spot are not considered founder variants and thus are not included. (2) Disorders with a carrier frequency ≤1/200 are not included.

Table.

Genetic Disorders Associated with Founder Variants Common in the Druze Population

GeneDisorderMOIDNA
Nucleotide
Change
(Alias 1)
Predicted
Protein
Change
% of Pathogenic Variants in Gene 2Carrier
Frequency
Ethnicity
(Specific
Region)
Reference
Sequences
References
ABCA4 Cone-rod dystrophy 3 (OMIM 604116)ARc.634C>Tp.Arg212Cys<100% 3UnknownDruze
(Israel)
NM_000350​.3
NP_000341​.2
Sharon et al [2020]
ASL Argininosuccinate lyase deficiency ARc.346C>Tp.Gln116Ter~100% 41/41Druze
(Galilee, Israel)
NM_000048​.4
NP_000039​.2
Falik-Zaccai et al [2008a]
c.446+1G>A
(IVS5+1G>A)
--1/40Druze
(Israel)
NM_000048​.4 Avnat et al [2023]
ATM Ataxia-telangiectasia;
ATM-related cancer predisposition
AR
AD
c.6672_6680delGGCTCTACGinsCTCp.Met2224_Arg2227delinsIleSer~70%1/3 to 1/6Druze
(N Israel) 5
NM_000051​.4
NP_000042​.3
Fares et al [2004], Avnat et al [2023]
c.1339C>Tp.Arg447Ter~30%1/6 to 1/15Druze
(N Israel) 6
1/59Druze
(Israel)
ATP7B Wilson disease ARc.3649_3654delGTTCTGp.Val1217_Leu1218del<100% 3~1/28Druze
(Israel)
NM_000053​.4
NP_000044​.2
Kalinsky et al [1998]
BCKDHB Maple syrup urine disease ARc.1016C>TSer339Leu~88%UnknownDruze
(N Israel)
NM_183050​.4
NP_898871​.1
Wynn et al [2001]
CDH3 Congenital hypotrichosis with juvenile macular dystrophy (OMIM 601553)ARc.981delGp.Met327IlefsTer23<100% 3UnknownDruze
(N Israel)
NM_001793​.6
NP_001784​.2
Sprecher et al [2001]
CFAP418
(C8orf37)
Retinitis pigmentosa ARc.545A>Gp.Gln182Arg~100% 41/45Druze
(Israel)
NM_177965​.4
NP_808880​.1
Estrada-Cuzcano et al [2012]
CPS1 Carbamoylphosphate synthetase I deficiency (See Urea Cycle Disorders Overview.)ARc.3265C>Tp.Arg1089Cys~100% 41/95Druze
(Galilee, Israel)
NM_001875​.5
NP_001866​.2
Falik-Zaccai et al [2008a]
CYP1B1 Primary congenital glaucoma ARc.1405C>Tp.Arg469Trp>60%UnknownDruze
(Israel)
NM_000104​.4
NP_000095​.2
Geyer et al [2011]
CYP27A1 Cerebrotendinous xanthomatosis ARc.355delCp.Arg119GlyfsTer24~100% 41/11 to 1/30Druze
(Yarka, Galilee,
Israel)
NM_000784​.4
NP_000775​.1
Leitersdorf et al [1994], Falik-Zaccai et al [2008a], DeBarber et al [2018]
DBT Maple syrup urine disease ARc.581C>Gp.Ser194Ter~100% 4UnknownDruze
(N Israel)
NM_001918​.5
NP_001909​.4
Chuang et al [2004]
DGUOK Deoxyguanosine kinase deficiency ARc.255delAp.Ala86ProfsTer13~100% 41/5Druze
(N Israel)
NM_080916​.3
NP_550438​.1
Mandel et al [2001]
DOLK Congenital disorder of glycosylation, type Im (See Congenital Disorders of N-Linked Glycosylation and Multiple Pathway Overview.)ARc.1222C>Gp.His408Asp~100% 4UnknownDruze
(Galilee, Israel)
NM_014908​.4
NP_055723​.1
Lefeber et al [2011]
EHD1 Tubular proteinuria and deafnessARc.1192C>Tp.Arg398Trp~100% 41/196Druze
(Israel)
NM_001282444​.2
NP_001269373​.1
Issler et al [2022]
ERCC6 Cockayne syndrome ARc.1034_1035insTp.Lys345AsnfsTer24~100% 41/15Druze
(N Israel)
NM_000124​.4
NP_000115​.1
Falik-Zaccai et al [2008b]
F7 Factor VII deficiency (OMIM 227500)ARc.1109G>Tp.Cys370Phe<100% 31/40Druze
(Israel)
NM_000131​.4
NP_000122​.1
Fromovich-Amit et al [2004], Avnat et al [2023]
FANCA Fanconi anemia ARc.3788_3790delTCTp.Phe1263del<100% 3UnknownDruze
(Israel)
NM_000135​.4
NP_000126​.2
Steinberg-Shemer et al [2020]
GALC Krabbe disease ARc.1796T>Gp.Ile599Ser~100% 4~1/6 to 1/16Druze
(N Israel)
NM_000153​.4
NP_000144​.2
Rafi et al [1996], Tappino et al [2010]
GATC Combined oxidative phosphorylation deficiency 42 (OMIM 618839)ARc.233T>Gp.Met78Arg~100% 41/59Druze
(Israel)
NM_176818​.3
NP_789788​.1
Friederich et al [2018], Avnat et al [2023]
GNPTG Mucolipidosis III gamma ARc.499dupCp.Leu167ProfsTer32<100% 31/59Druze
(N Israel)
NM_032520​.5
NP_115909​.1
Raas-Rothschild et al [2000], Avnat et al [2023]
HOGA1 Primary hyperoxaluria, type III (OMIM 613616)ARc.944_946delAGGp.Glu315del~100% 41/20Druze
(Israel)
NM_138413​.4
NP_612422​.2
Avnat et al [2023]
IDUA Mucopolysaccharidosis type 1 ARc.1096A>Cp.Thr366Pro~60%1/39Druze
(Galilee, Israel)
NM_000203​.5
NP_000194​.2
Bach et al [1993], Avnat et al [2023]
INSR INSR-related severe syndromic insulin resistance ARc.167T>Cp.Ile56Thr~100% 4~1/50Druze
(Israel)
NM_000208​.4
NP_000199​.2
Falik-Zaccai et al [2014]
LDLR Familial hypercholesterolemia AD
AR
c.564C>Gp.Tyr188Ter<100% 3UnknownDruze
(Golan Heights)
NM_000527​.5
NP_000518​.1
Landsberger et al [1992]
MCOLN1 Mucolipidosis IV ARc.964C>Tp.Arg322Ter<100% 3UnknownDruze
(Golan Heights)
NM_020533​.3
NP_065394​.1
Bargal et al [2001]
MEFV Familial Mediterranean fever ARc.442G>Cp.Glu148Gln52%UnknownDruze
(Israel)
NM_000243​.3
NP_000234​.1
Sharkia et al [2013], Avnat et al [2023]
c.2177T>Cp.Val726Ala41%
c.2082G>Ap.Met694Ile7%1/40
MUTYH MUTYH polyposis ARc.1437_1439delGGAp.Glu480del~100% 41/34Druze
(Israel)
NM_001128425​.2
NP_001121897​.1
Avnat et al [2023], Reznick Levi et al [2023]
NARS2 Combined oxidative phosphorylation deficiency 24 (OMIM 616239)ARc.500A>Gp.His167Arg~100% 4UnknownDruze
(Israel)
NM_024678​.6
NP_078954​.4
Mizuguchi et al [2017]
NGLY1 NGLY1-related congenital disorder of deglycosylation ARc.1294G>Tp.Glu432Ter~100% 41/25Druze
(village in Israel)
NM_018297​.4
NP_060767​.2
Kalfon et al [2022]
PCNT Microcephalic osteodysplastic primordial dwarfism type II ARc.3465-1G>A
(IVS17-1G>A)
--~100% 41/30Druze
(N Israel)
NM_006031​.6 Weiss et al [2020]
PEPD Prolidase deficiency ARc.605C>Tp.Ser202Phe~85%1/21Druze
(Galilee, Israel)
NM_000285​.4
NP_000276​.2
Falik-Zaccai et al [2008a], Falik-Zaccai et al [2010]
RDH5 Fundus albipunctatus (OMIM 136880)AD
AR
c.712G>Tp.Gly238Trp~100% 41/40Druze
(Israel)
NM_002905​.5
NP_002896​.2
Sharon et al [2020], Avnat et al [2023]
ROGDI Kohlschutter-Tonz syndrome (OMIM 226750)ARc.469C>Tp.Arg157Ter~100% 4~1/10Druze
(N Israel)
NM_024589​.3
NP_078865​.1
Mory et al [2012]

Included if ≤3 pathogenic variants account for ≥50% of variants identified in a specific ethnic group

AD = autosomal dominant; AR = autosomal recessive; MOI = mode of inheritance; N = northern

1.

Does not conform to standard HGVS nomenclature.

2.

This percentage does not account for the possibility of rare de novo pathogenic variants occurring in this population.

3.

At least one additional variant reported in this population in ≥1 family (See Israeli Medical Genetic Database.)

4.

To date, additional pathogenic variants in this gene have not been reported in individuals of Druze descent.

5.

Druze population originally from Lebanon and Syria.

6.

Druze population originally from central Lebanon and Jordan

References

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  • Kalfon L, Baydany M, Samra N, Heno N, Segal Z, Eran A, Yulevich A, Fellig Y, Mandel H, Falik-Zaccai TC. Congenital hypotonia: cracking a saga of consanguineous kindred harboring four genetic variants. Mol Genet Genomic Med. 2022;10:e1849. [PMC free article: PMC8801141] [PubMed: 34970863]
  • Kalinsky H, Funes A, Zeldin A, Pel-Or Y, Korostishevsky M, Gershoni-Baruch R, Farrer LA, Bonne-Tamir B. Novel ATP7B mutations causing Wilson disease in several Israeli ethnic groups. Hum Mutat. 1998;11:145-51. [PubMed: 9482578]
  • Landsberger D, Meiner V, Reshef A, Levy Y, van der Westhuyzen DR, Coetzee GA, Leitersdorf E. A nonsense mutation in the LDL receptor gene leads to familial hypercholesterolemia in the Druze sect. Am J Hum Genet. 1992;50:427-433. [PMC free article: PMC1682466] [PubMed: 1734722]
  • Lefeber DJ, de Brouwer AP, Morava E, Riemersma M, Schuurs-Hoeijmakers JH, Absmanner B, Verrijp K, van den Akker WM, Huijben K, Steenbergen G, van Reeuwijk J, Jozwiak A, Zucker N, Lorber A, Lammens M, Knopf C, van Bokhoven H, Grünewald S, Lehle L, Kapusta L, Mandel H, Wevers RA. Autosomal recessive dilated cardiomyopathy due to DOLK mutations results from abnormal dystroglycan O-mannosylation. PLoS Genet. 2011;7:e1002427. [PMC free article: PMC3248466] [PubMed: 22242004]
  • Leitersdorf E, Safadi R, Meiner V, Reshef A, Bjorkhem I, Friedlander Y, Morkos S, Berginer VM. Cerebrotendinous xanthomatosis in the Israeli Druze: molecular genetics and phenotypic characteristics. Am J Hum Genet. 1994;55:907–15. [PMC free article: PMC1918342] [PubMed: 7977352]
  • Mandel H, Szargel R, Labay V, Elpeleg O, Saada A, Shalata A, Anbinder Y, Berkowitz D, Hartman C, Barak M, Eriksson S, Cohen N. The deoxyguanosine kinase gene is mutated in individuals with depleted hepatocerebral mitochondrial DNA. Nat Genet. 2001;29:337-41. [PubMed: 11687800]
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Revision History

  • 28 September 2023 (sw) Revision: added ABCA4, EHD1, FANCA, HOGA1, MUTYH, NGLY1, and RDH5; updated reference sequences
  • 16 December 2021 (ha) Revision: added Falik-Zaccai et al [2008a]
  • 7 November 2019 (sw) Initial posting
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