Albinism, Oculocutaneous, Type Ia; Oca1a

Table of contents:

Description
Related genes
Clinical Features
Incidence and onset information
Alternative Names
Researches and researchers
Gene Panels
Sources and references

Description

Oculocutaneous albinism is a genetically heterogeneous congenital disorder characterized by decreased or absent pigmentation in the hair, skin, and eyes. The term 'albinism' includes specific ocular changes that are the results of reduced amounts of melanin in the developing eye; these abnormalities in the eye and optic system are specific and necessary for the diagnosis. Aside from decreased pigment in the iris and retina, optic changes include decreased visual acuity, misrouting of the optic nerves at the chiasm, and nystagmus (King et al., 2001).Although OCA caused by mutations in the TYR gene was classically known as 'tyrosinase-negative' OCA, Tripathi et al. (1992) noted that some patients with 'tyrosinase-positive' OCA may indeed have TYR mutations resulting in residual enzyme activity. These patients can be classified as having OCA1B. Genetic Heterogeneity of Oculocutaneous AlbinismOCA1, caused by mutations in the TYR gene, is divided clinically into 2 types: type IA, OCA1A, characterized by complete lack of tyrosinase activity due to production of an inactive enzyme, and type IB (OCA1B ), characterized by reduced activity of tyrosinase. OCA2 (OMIM ), OCA3 (OMIM ), and OCA4 (OMIM ) are somewhat milder forms of the disorder, caused by mutations in the OCA2 (OMIM ), TYRP1 (OMIM ), and MATP (SLC45A2 ) genes, respectively. OCA5 (OMIM ) has been mapped to chromosome 4q24. OCA6 (see {113750}) is caused by mutation in the SLC24A5 gene (OMIM ). OCA7 (OMIM ) is caused by mutation in the C10ORF11 gene (OMIM ).See also ocular albinism (OA1 ), which is restricted phenotypically to ocular involvement only.

Genes related to Albinism, Oculocutaneous, Type Ia; Oca1a

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Clinical Features

Top most frequent phenotypes and symptoms related to Albinism, Oculocutaneous, Type Ia; Oca1a

Nystagmus
Strabismus
Myopia
Visual loss
Reduced visual acuity
Photophobia
Astigmatism
Hypopigmentation of the skin
Exotropia
Albinism

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Incidence and onset information

— Based on the latest data available ALBINISM, OCULOCUTANEOUS, TYPE IA; OCA1A have a estimated prevalence of 2.5 per 100k in Europe.
— No data available about the known clinical features onset.

Alternative names

Albinism, Oculocutaneous, Type Ia; Oca1a Is also known as oculocutaneous albinism, type i, atn, albinism i, oca1, oculocutaneous albinism, tyrosinase-negative.

Researches and researchers

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Albinism, Oculocutaneous, Type Ia; Oca1a Recommended genes panels

Panel Name, Specifity and genes Tested/covered
MitoMet®Plus aCGH Analysis. By Baylor Miraca Genetics Laboratories (United States). RGS9, RHO, GRK1, RLBP1, RNASEL, BCS1L, RP1, RP2, RP9, RPE65, RPGR, RPL35A, MRPL3, RPS14, RS1, SAG, SARDH, SCO2, SCP2, SDHB , (...) View the complete list with 612 more genes Panel complete gene list RGS9, RHO, GRK1, RLBP1, RNASEL, BCS1L, RP1, RP2, RP9, RPE65, RPGR, RPL35A, MRPL3, RPS14, RS1, SAG, SARDH, SCO2, SCP2, SDHB, SDHC, SEMA4A, SGSH, SHH, SIX6, FOXL2, SLC16A1, SLC22A4, SLC22A5, SLC24A1, SLC25A12, SLC25A13, SLC25A15, SLC25A3, SLC25A4, BRCA1, SLC34A1, SLC35A1, SLC3A1, SLC9A3R1, SLC9A6, SMPD1, SNCB, SOD1, SOD2, SOX2, BTD, SPG7, SPR, SPTLC2, SQSTM1, STAR, STAT1, STAT3, STXBP1, SUCLA2, SUCLG1, SUOX, SURF1, TAT, TAZ, TWNK, HNF1A, HNF1B, ZEB1, TCIRG1, TCN2, TEAD1, TGFB1, TGFBI, ACO2, TIMM8A, TIMP3, TK2, TLR3, TLR4, ACOX1, TNFRSF11A, TNFRSF11B, TNFSF11, TP53, TSFM, TUFM, TULP1, TYR, TYROBP, TYRP1, UBE3A, UCP1, UCP2, UCP3, UNG, UQCRB, USH1C, USH2A, CLRN1, VCP, VHL, BEST1, VSX1, WFS1, WT1, WWOX, XDH, ARL6, LPIN1, RPGRIP1, CA2, CDH23, CA4, SOST, GFM1, CABP4, CACNA1F, MRPS16, ELAC2, SLC25A20, C1QTNF5, HTRA2, SLC25A19, ELOVL4, MRPS22, CDHR1, PINK1, AMN, ABCA12, FYCO1, PCDH15, CASP8, CAT, PRPF31, ANKH, CBS, PUS1, HPS3, KLHL7, ALG9, LRPPRC, HPS4, PRPF6, ABHD12, PANK2, NDUFAF5, RP1L1, APTX, COX4I2, NFU1, USH1G, WHRN, PARK7, TRIM32, LIAS, SLC45A2, KIF1B, MCEE, COQ8A, MFN2, HAX1, HPS5, OPTN, NDUFA13, RIMS1, RRM2B, SP7, DTNBP1, PRPF8, AASS, ADGRV1, SARS2, PDSS1, NT5C3A, INVS, NAGS, MFRP, FKBP10, ALG1, IMPG2, ATP6V0A2, COG7, COG8, RAX, BBS7, ATPAF2, HPS6, NDUFAF1, MMAA, NPHP4, CHAT, MTO1, P3H1, MMAB, KIF21A, ALG12, CHM, RD3, KCNV2, SLC25A22, RDH12, CYCS, TTC8, GLRX5, GPR143, SLC35C1, CACNA2D4, COQ6, CLCN7, NUBPL, NDUFA11, SPATA7, L2HGDH, DHDDS, TPP1, CLN3, TUBA1A, TUBB3, SLC39A13, BCOR, BLOC1S3, AARS2, NDUFAF4, PITPNM3, ABHD5, RARS2, INPP5E, CNGA1, ACAD9, CNGA3, CNGB1, DIABLO, CNGB3, EYS, ADAM9, TSPAN12, OSTM1, TOPORS, CERKL, AGK, COL1A2, COL3A1, COL5A1, COL5A2, FAM20C, COX15, COX6B1, ABAT, LMBRD1, PDSS2, ALG3, ALG6, ALG2, ALG8, CYP4V2, CPOX, CPT1A, ETHE1, CPT2, CRB1, GNE, CRTAP, CRX, CRYAB, NDUFA12, CISD2, GLYCTK, YARS2, BOLA3, DMGDH, MMACHC, FLVCR1, MMADHC, COQ2, CCDC39, CTSD, COQ9, CTSK, TMEM126A, CUBN, TRMU, MTPAP, DARS2, CYB5A, CYBA, REEP1, FAM161A, SRD5A3, CYP11A1, CYP11B1, CYP11B2, CYP17A1, CYP1B1, TTC19, CYP24A1, SDHAF2, TMEM127, CYP27A1, TMEM70, SLC25A38, CYP27B1, PDZD7, BBS10, ZNF513, HGSNAT, BBS12, C12orf65, AMER1, FOXRED1, DBT, C8orf37, DDOST, ACSF3, MSRB3, XPNPEP3, NDUFAF2, CCDC28B, COX14, D2HGDH, TMEM67, DGUOK, NDUFAF6, DHODH, CYB5R3, LEMD3, IQCB1, DLAT, DLD, CEP290, ADSL, FASTKD2, ANKRD26, CC2D2A, UQCRQ, GNPTAB, DNM1L, ISCU, NDUFAF3, BBS9, PPARGC1B, DPM1, DPM3, RFT1, TUSC3, RILP, DSP, DNAJC19, STRA6, PNPLA2, SNRNP200, SECISBP2, TYMP, AFG3L2, LCA5, AGL, EFEMP1, PRCD, AGPS, ELN, ENO3, SDHAF1, ABCA4, AGXT, PCARE, ETFA, ETFB, ETFDH, EYA1, EYA4, ACSL4, FAH, AIPL1, FBLN5, FBN1, FBP1, AK1, AK2, FECH, AKAP10, FH, ATP8B1, FOXC1, FXN, FSCN2, ALAS2, ALDH3A2, FZD4, G6PC, ALDH4A1, SLC37A4, GAA, ALDH5A1, GAD1, GALC, GALE, GALK1, GALNS, GALT, GAMT, ALDOA, GARS, ALDOB, GATM, GBE1, GCDH, GCK, GCKR, ABCB11, OPN1MW, GCSH, GFER, CBLIF, GJA3, ALMS1, GK, GLB1, TAP1, GLDC, GLUD1, GM2A, GNAT1, GNAT2, GNS, GOT1, GPD1, GPD2, GPI, ABCB4, AMACR, GPX1, GRM6, GRN, GSN, GUCA1A, GUCA1B, GUCY2D, GUSB, ABCB6, GYS1, GYS2, AMT, ABCB7, HSD17B10, HADHA, HADHB, HAGH, HARS, HBB, HCCS, HESX1, HEXA, HEXB, HIBCH, HK1, HLCS, HMGCL, HMGCS2, HP, HPRT1, HPS1, HSD17B4, HSD3B2, HSPD1, IDH2, IDH3B, AP3B1, IMPDH1, ABCD1, IVD, JAG1, APP, KARS, KCNJ13, KRT12, KRT3, KRT5, LDHA, LDHB, COG1, ARG1, LMX1B, LRAT, LRP5, MAN2B1, MANBA, MAOA, PHOX2A, MC1R, MCCC1, MCCC2, ME2, MECP2, MEF2A, MEN1, MERTK, MGAT2, MKKS, MKS1, TRPM1, MLYCD, ALDH6A1, MOCS1, MOCS2, MPDU1, MPI, MPV17, SEPT9, MTHFR, ASL, MTR, MTRR, MMUT, MUTYH, ASS1, MYO7A, MYOC, NAGLU, NCOA4, NDP, NDUFA1, NDUFA10, NDUFA2, NDUFA9, NDUFB3, NDUFS1, NDUFS2, NDUFS3, NDUFS4, NDUFS6, NDUFS7, NDUFS8, NDUFV1, NDUFV2, NEFH, NEUROD1, ZFHX3, NHS, NME1, NPHP1, NPHP3, ATIC, NRL, FRMD7, NYX, OAT, OCA2, OCRL, OGDH, OGG1, OPA1, OPA3, ATP5F1E, ACACA, OTC, OTX2, OXCT1, PAH, PRKN, PAX2, PAX6, PC, PCCA, PCCB, ATP7A, ACAD8, ATP7B, PCK2, AIFM1, ALDH7A1, PDE6A, PDE6B, PDE6C, PDE6G, PDHA1, PDHB, SLC26A4, SERPINF1, PFKM, PGAM2, ACADM, AUH, PGM1, PHB, PHKA1, PHKA2, PHKB, PHKG2, PHYH, ACADS, PITX2, PITX3, PLA2G2A, PLOD2, PLOD3, ACADSB, PMM2, PNKD, POLG, POLG2, ACADVL, PPARG, B4GALT1, CTSA, PPIB, PDP1, PPOX, ACAT1, B4GALT7, PPP2R1B, ACAT2, PRKCG, PRODH, PROM1, PSAP, PSEN1, BBS1, BBS2, CAVIN1, PTS, BBS4, BBS5, PYCR1, ALDH18A1, PYGL, PYGM, QDPR, RAF1, BCKDHA, BCKDHB, RB1, OPN1LW, RDH5, PRPH2, RET, RGR Specificity 1 % Genes 100 %
TYR Sequence Analysis. By Baylor Miraca Genetics Laboratories (United States). TYR Specificity 100 % Genes 100 %
TYR Sequence Analysis (Familial Mutation/Variant Analysis). By Baylor Miraca Genetics Laboratories (United States). TYR Specificity 100 % Genes 100 %
TYR Sequence Analysis (Prenatal Diagnosis). By Baylor Miraca Genetics Laboratories (United States). TYR Specificity 100 % Genes 100 %
Ocular Albinism and Hermansky Pudlak Panel. By Greenwood Genetic Center Diagnostic Laboratories Greenwood Genetic Center (United States). TYR, TYRP1, HPS3, HPS4, SLC45A2, HPS5, DTNBP1, HPS6, LYST, GPR143, SLC24A5, BLOC1S3, LRMDA, AP3B1, MC1R, OCA2, BLOC1S6 Specificity 6 % Genes 100 %
Oculocutaneous Albinism, Type 1 - TYR Sequencing. By Children's Hospital Colorado Molecular Genetics Laboratory Children's Hospital Colorado (United States). TYR Specificity 100 % Genes 100 %
Oculocutaneous albinism, Type 1, 2, 3, 4, 6, 7, NGS panel. By Medical Genetics Laboratory, Kennedy Center Juliane Marie Center, Rigshospitalet (Denmark). TYR, TYRP1, SLC45A2, SLC24A5, LRMDA, OCA2 Specificity 17 % Genes 100 %
Oculocutaneous albinism type 1. By Medical Genetics Laboratory, Kennedy Center Juliane Marie Center, Rigshospitalet (Denmark). TYR Specificity 100 % Genes 100 %

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Sources and references

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ORPHANET OMIM Genetic Syndrome Finder

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