128 Further alignment showed that the R765Q mutation in ABCC6/MRP6 is the positional equivalent of both the R560T mutation in ABCC7,28 and the R842G mutation in ABCC8.29 Similarly, additional possible positional equivalent clusters of conserved and mutated residues were found between ABCC6/ MRP6 and ABCC2 (R1114H and R1150H),30 ABCC6/MRP6 and ABCC7 (3775 del T and W1204X),31 ABCC6/MRP6 and ABCR (R1459C and H2128R, 4220InsAGAA and R2077W, R1141X and L1631P).32,33 Interestingly, for both ABCC7 and ABCR, models were postulated in which the severity of the disease shows an inverse correlation with the predicted transport activity of the ABC protein.

X

ABCA4 p.His2128Arg 12673275:128:406

status: NEW

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102 Thirty-Three Truncated and 98 Amino Acid-Changing Variants in the ABCA4 Gene Exon Nucleotide Change Effect (A) (B) AMD (n ‫؍‬ 182) Control (n ‫؍‬ 96) STGD (n ‫؍‬ 374) Allele Prevalence 2 106delT FS NS 0 0 1 Ͻ0.01 2 160 ϩ 1g 3 a Splice site NS 0 0 1 Ͻ0.01 3 161G 3 A Cys54Tyr NS 0 0 6 Ͻ0.01 3 179C 3 T Ala60Val NS 0 0 2 Ͻ0.01 3 194G 3 A Gly65Glu NS 0 0 2 Ͻ0.01 3 223T 3 G Cys75Gly NS 0 0 2 Ͻ0.01 3 247delCAAA FS NS 0 0 2 Ͻ0.01 3 298C 3 T Ser100Pro NS 0 0 1 Ͻ0.01 5 454C 3 T Arg152Stop NS 0 0 2 Ͻ0.01 6 574G 3 A Ala192Thr NS 0 0 1 Ͻ0.01 6 618C 3 G Ser206Arg NS 0 0 3 Ͻ0.01 6 634C 3 T Arg212Cys 0.02 Yes 0 0 7 0.01 6 635G 3 A Arg212His NS 2 2 6 0.01 6 658C 3 T Arg220Cys NS 0 0 2 Ͻ0.01 6 661delG FS NS 0 0 1 Ͻ0.01 666delAAAGACGGTGC 6 GC FS NS 0 0 1 Ͻ0.01 6 746A 3 C Asp249Gly NS 0 0 1 Ͻ0.01 8 899C 3 A Thr300Asn NS 0 0 1 Ͻ0.01 8 997C 3 T Arg333Trp NS 0 0 1 Ͻ0.01 9 1140T 3 A Asn380Lys NS 0 0 1 Ͻ0.01 9 1222C 3 T Arg408Stop NS 0 0 1 Ͻ0.01 10 1268A 3 G His423Arg NS 1 0 7 0.01 10 1335C 3 G Ser445Arg NS 0 0 1 Ͻ0.01 10 1344delG FS NS 0 0 1 Ͻ0.01 11 1411G 3 A Glu471Lys NS 0 0 3 Ͻ0.01 11 1513delATCAC FS NS 0 0 1 Ͻ0.01 12 1622T 3 C Leu541Pro 0.001 Yes 0 0 11 0.01 13 1804C 3 T Arg602Trp NS 0 0 3 Ͻ0.01 13 1805G 3 A Arg602Gln NS 0 0 1 Ͻ0.01 13 1819G 3 T Gly607Trp NS 0 0 1 Ͻ0.01 13 1823T 3 A Phe608Ile NS 0 0 1 Ͻ0.01 13 1927G 3 A Val643Met NS 0 0 1 Ͻ0.01 14 1989G 3 T Trp663Stop NS 0 0 1 Ͻ0.01 14 2005delAT FS NS 0 0 3 Ͻ0.01 14 2041C 3 T Arg681Stop NS 0 0 2 Ͻ0.01 14 2147C 3 T Thr716Met NS 0 0 1 Ͻ0.01 15 2291G 3 A Cys764Tyr NS 0 0 1 Ͻ0.01 15 2294G 3 A Ser765Asn NS 0 0 1 Ͻ0.01 15 2300T 3 A Val767Asp NS 0 0 2 Ͻ0.01 16 2385del16bp FS NS 0 0 1 Ͻ0.01 16 2453G 3 A Gly818Glu NS 0 0 1 Ͻ0.01 16 2461T 3 A Trp821Arg NS 0 0 1 Ͻ0.01 16 2546T 3 C Val849Ala NS 0 0 4 Ͻ0.01 16 2552G 3 A Gly851Asp NS 0 0 1 Ͻ0.01 16 2560G 3 A Ala854Thr NS 0 0 1 Ͻ0.01 17 2588G 3 C Gly863Ala 0.0006 No 2 2 28 0.02 17 2617T 3 C Phe873Leu NS 0 0 1 Ͻ0.01 18 2690C 3 T Thr897Ile NS 0 0 1 Ͻ0.01 18 2701A 3 G Thr901Ala NS 0 1 0 Ͻ0.01 18 2703A 3 G Thr901Arg NS 0 0 2 Ͻ0.01 19 2828G 3 A Arg943Gln NS 20 13 37 0.05 19 2883delC FS NS 0 0 1 Ͻ0.01 20 2894A 3 G Asn965Ser NS 0 0 3 Ͻ0.01 19 2912C 3 A Thr971Asn NS 0 0 1 Ͻ0.01 19 2915C 3 A Thr972Asn NS 0 0 1 Ͻ0.01 20 2920T 3 C Ser974Pro NS 0 0 1 Ͻ0.01 20 2966T 3 C Val989Ala NS 0 0 2 Ͻ0.01 20 2977del8bp FS NS 0 0 1 Ͻ0.01 20 3041T 3 G Leu1014Arg NS 0 0 1 Ͻ0.01 21 3055A 3 G Thr1019Ala NS 0 0 1 Ͻ0.01 21 3064G 3 A Glu1022Lys NS 0 0 1 Ͻ0.01 21 3091A 3 G Lys1031Glu NS 0 0 1 Ͻ0.01 21 3113G 3 T Ala1038Val 0.001 Yes 1 0 17 0.01 22 3205insAA FS NS 0 0 1 Ͻ0.01 22 3261G 3 A Glu1087Lys NS 0 0 2 Ͻ0.01 22 3322C 3 T Arg1108Cys 0.04 Yes 0 0 6 Ͻ0.01 22 3323G 3 A Arg1108His NS 0 0 1 Ͻ0.01 23 3364G 3 A Glu1122Lys NS 0 0 1 Ͻ0.01 (continues) Exon Nucleotide Change Effect (A) (B) AMD (n ‫؍‬ 182) Control (n ‫؍‬ 96) STGD (n ‫؍‬ 374) Allele Prevalence 23 3386G 3 T Arg1129Leu NS 0 0 3 Ͻ0.01 24 3531C 3 A Cys1158Stop NS 0 0 1 Ͻ0.01 25 3749T 3 C Leu1250Pro NS 0 0 1 Ͻ0.01 26 3835delGATTCT FS NS 0 0 1 Ͻ0.01 27 3940C 3 A Pro1314Thr NS 0 1 0 Ͻ0.01 28 4139C 3 T Pro1380Leu 0.001 Yes 0 0 10 0.01 28 4222T 3 C Trp1408Arg NS 0 0 2 Ͻ0.01 28 4223G 3 T Trp1408Leu NS 0 0 2 Ͻ0.01 28 4234C 3 T Gln1412stop NS 0 0 1 Ͻ0.01 29 4297G 3 A Val1433Ile NS 1 0 0 Ͻ0.01 29 4319T 3 C Phe1440Ser NS 0 0 1 Ͻ0.01 30 4353 - 1g 3 t Splice site NS 0 0 1 Ͻ0.01 30 4457C 3 T Pro1486Leu NS 0 0 1 Ͻ0.01 30 4462T 3 C Cys1488Arg NS 0 0 3 Ͻ0.01 30 4463G 3 T Cys1488Phe NS 0 0 2 Ͻ0.01 30 4469G 3 A Cys1490Tyr NS 0 0 3 Ͻ0.01 30 4531insC FS NS 0 0 2 Ͻ0.01 32 4538A 3 G Gln1513Arg NS 0 0 1 Ͻ0.01 30 4539 ϩ 1g 3 t Splice site NS 0 0 1 Ͻ0.01 31 4574T 3 C Leu1525Pro NS 0 0 1 Ͻ0.01 33 4733delGTTT FS NS 0 0 1 Ͻ0.01 4859delATAACAinsTCC 35 T FS NS 0 0 1 Ͻ0.01 36 4909G 3 A Ala1637Thr NS 0 0 1 Ͻ0.01 35 4918C 3 T Arg1640Trp NS 0 0 1 Ͻ0.01 35 4919G 3 A Arg1640Gln NS 0 0 1 Ͻ0.01 35 4954T 3 G Tyr1652Asp NS 0 0 1 Ͻ0.01 36 5077G 3 A Val1693Ile NS 0 0 1 Ͻ0.01 36 5186T 3 C Leu1729Pro NS 0 0 2 Ͻ0.01 36 5206T 3 C Ser1736Pro NS 0 0 1 Ͻ0.01 36 5212del11bp FS NS 0 0 1 Ͻ0.01 37 5225delTGGTGGTGGGC FS NS 0 0 1 Ͻ0.01 del LPA 37 5278del9bp 1760 NS 0 0 1 Ͻ0.01 37 5288delG FS NS 0 0 1 Ͻ0.01 38 5395A 3 G Asn1799Asp NS 0 0 1 Ͻ0.01 38 5451T 3 G Asp1817Glu NS 1 0 4 Ͻ0.01 39 5584 ϩ 5g 3 a Splice site 0.02 Yes 0 0 6 Ͻ0.01 40 5603A 3 T Asn1868Ile 0.0006 No 20 7 79 0.08 40 5651T 3 A Val1884GLu NS 0 0 1 Ͻ0.01 40 5657G 3 A Gly1886Glu NS 0 0 1 Ͻ0.01 40 5687T 3 A Val1896Asp NS 0 0 1 Ͻ0.01 40 5693G 3 A Arg1898His NS 0 0 1 Ͻ0.01 40 5714 ϩ 5g 3 a Splice site NS 0 0 1 Ͻ0.01 42 5843CA 3 TG Pro1948Leu NS 11 7 28 0.04 42 5882G 3 A Gly1961Glu Ͻ0.0001 Yes 1 0 43 0.03 43 5908C 3 T Leu1970Phe NS 1 0 1 Ͻ0.01 43 5917delG FS NS 0 0 1 Ͻ0.01 44 6079C 3 T Leu2027Phe 0.01 Yes 0 0 9 0.01 44 6088C 3 T Arg2030Stop NS 0 0 2 Ͻ0.01 44 6089G 3 A Arg2030Gln NS 0 0 1 Ͻ0.01 44 6112A 3 T Arg2038Trp NS 0 0 1 Ͻ0.01 45 6148A 3 C Val2050Leu NS 1 0 0 Ͻ0.01 46 6212A 3 T Tyr2071Phe NS 0 0 1 Ͻ0.01 45 6229C 3 T Arg2077Trp NS 0 0 2 Ͻ0.01 46 6320G 3 A Arg2107His 0.01 Yes 0 0 10 0.01 46 6383A 3 G His2128Arg NS 0 0 1 Ͻ0.01 47 6446G 3 T Arg2149Leu NS 0 0 1 Ͻ0.01 47 6449G 3 A Cys2150Tyr NS 0 0 5 Ͻ0.01 48 6529G 3 A Asp2177Asn NS 2 0 0 Ͻ0.01 48 6686T 3 C Leu2229Pro NS 0 0 1 Ͻ0.01 48 6707delTCACACAG FS NS 0 0 1 Ͻ0.01 48 6729 ϩ 1g 3 a Splice site NS 0 0 1 Ͻ0.01 49 6764G 3 T Ser2255Ile 0.009 No 16 4 54 0.06 49 6788G 3 T Arg2263Leu NS 0 0 1 Ͻ0.01 (A) The probability under the null hypothesis of similar prevalence of each variant in Stargardt (STGD) compared with non-STGD alleles (two-tailed Fisher`s exact test); (B) compatability of the variant existing in a ratio of 100:1 in STGD to control alleles, calculated using the binomial distribution.

X

ABCA4 p.His2128Arg 11328725:102:5792

status: NEW

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103 Thirty-Three Truncated and 98 Amino Acid-Changing Variants in the ABCA4 Gene Exon Nucleotide Change Effect (A) (B) AMD (n d1d; 182) Control (n d1d; 96) STGD (n d1d; 374) Allele Prevalence 2 106delT FS NS 0 0 1 b0d;0.01 2 160 af9; 1g 3 a Splice site NS 0 0 1 b0d;0.01 3 161G 3 A Cys54Tyr NS 0 0 6 b0d;0.01 3 179C 3 T Ala60Val NS 0 0 2 b0d;0.01 3 194G 3 A Gly65Glu NS 0 0 2 b0d;0.01 3 223T 3 G Cys75Gly NS 0 0 2 b0d;0.01 3 247delCAAA FS NS 0 0 2 b0d;0.01 3 298C 3 T Ser100Pro NS 0 0 1 b0d;0.01 5 454C 3 T Arg152Stop NS 0 0 2 b0d;0.01 6 574G 3 A Ala192Thr NS 0 0 1 b0d;0.01 6 618C 3 G Ser206Arg NS 0 0 3 b0d;0.01 6 634C 3 T Arg212Cys 0.02 Yes 0 0 7 0.01 6 635G 3 A Arg212His NS 2 2 6 0.01 6 658C 3 T Arg220Cys NS 0 0 2 b0d;0.01 6 661delG FS NS 0 0 1 b0d;0.01 666delAAAGACGGTGC 6 GC FS NS 0 0 1 b0d;0.01 6 746A 3 C Asp249Gly NS 0 0 1 b0d;0.01 8 899C 3 A Thr300Asn NS 0 0 1 b0d;0.01 8 997C 3 T Arg333Trp NS 0 0 1 b0d;0.01 9 1140T 3 A Asn380Lys NS 0 0 1 b0d;0.01 9 1222C 3 T Arg408Stop NS 0 0 1 b0d;0.01 10 1268A 3 G His423Arg NS 1 0 7 0.01 10 1335C 3 G Ser445Arg NS 0 0 1 b0d;0.01 10 1344delG FS NS 0 0 1 b0d;0.01 11 1411G 3 A Glu471Lys NS 0 0 3 b0d;0.01 11 1513delATCAC FS NS 0 0 1 b0d;0.01 12 1622T 3 C Leu541Pro 0.001 Yes 0 0 11 0.01 13 1804C 3 T Arg602Trp NS 0 0 3 b0d;0.01 13 1805G 3 A Arg602Gln NS 0 0 1 b0d;0.01 13 1819G 3 T Gly607Trp NS 0 0 1 b0d;0.01 13 1823T 3 A Phe608Ile NS 0 0 1 b0d;0.01 13 1927G 3 A Val643Met NS 0 0 1 b0d;0.01 14 1989G 3 T Trp663Stop NS 0 0 1 b0d;0.01 14 2005delAT FS NS 0 0 3 b0d;0.01 14 2041C 3 T Arg681Stop NS 0 0 2 b0d;0.01 14 2147C 3 T Thr716Met NS 0 0 1 b0d;0.01 15 2291G 3 A Cys764Tyr NS 0 0 1 b0d;0.01 15 2294G 3 A Ser765Asn NS 0 0 1 b0d;0.01 15 2300T 3 A Val767Asp NS 0 0 2 b0d;0.01 16 2385del16bp FS NS 0 0 1 b0d;0.01 16 2453G 3 A Gly818Glu NS 0 0 1 b0d;0.01 16 2461T 3 A Trp821Arg NS 0 0 1 b0d;0.01 16 2546T 3 C Val849Ala NS 0 0 4 b0d;0.01 16 2552G 3 A Gly851Asp NS 0 0 1 b0d;0.01 16 2560G 3 A Ala854Thr NS 0 0 1 b0d;0.01 17 2588G 3 C Gly863Ala 0.0006 No 2 2 28 0.02 17 2617T 3 C Phe873Leu NS 0 0 1 b0d;0.01 18 2690C 3 T Thr897Ile NS 0 0 1 b0d;0.01 18 2701A 3 G Thr901Ala NS 0 1 0 b0d;0.01 18 2703A 3 G Thr901Arg NS 0 0 2 b0d;0.01 19 2828G 3 A Arg943Gln NS 20 13 37 0.05 19 2883delC FS NS 0 0 1 b0d;0.01 20 2894A 3 G Asn965Ser NS 0 0 3 b0d;0.01 19 2912C 3 A Thr971Asn NS 0 0 1 b0d;0.01 19 2915C 3 A Thr972Asn NS 0 0 1 b0d;0.01 20 2920T 3 C Ser974Pro NS 0 0 1 b0d;0.01 20 2966T 3 C Val989Ala NS 0 0 2 b0d;0.01 20 2977del8bp FS NS 0 0 1 b0d;0.01 20 3041T 3 G Leu1014Arg NS 0 0 1 b0d;0.01 21 3055A 3 G Thr1019Ala NS 0 0 1 b0d;0.01 21 3064G 3 A Glu1022Lys NS 0 0 1 b0d;0.01 21 3091A 3 G Lys1031Glu NS 0 0 1 b0d;0.01 21 3113G 3 T Ala1038Val 0.001 Yes 1 0 17 0.01 22 3205insAA FS NS 0 0 1 b0d;0.01 22 3261G 3 A Glu1087Lys NS 0 0 2 b0d;0.01 22 3322C 3 T Arg1108Cys 0.04 Yes 0 0 6 b0d;0.01 22 3323G 3 A Arg1108His NS 0 0 1 b0d;0.01 23 3364G 3 A Glu1122Lys NS 0 0 1 b0d;0.01 (continues) Exon Nucleotide Change Effect (A) (B) AMD (n d1d; 182) Control (n d1d; 96) STGD (n d1d; 374) Allele Prevalence 23 3386G 3 T Arg1129Leu NS 0 0 3 b0d;0.01 24 3531C 3 A Cys1158Stop NS 0 0 1 b0d;0.01 25 3749T 3 C Leu1250Pro NS 0 0 1 b0d;0.01 26 3835delGATTCT FS NS 0 0 1 b0d;0.01 27 3940C 3 A Pro1314Thr NS 0 1 0 b0d;0.01 28 4139C 3 T Pro1380Leu 0.001 Yes 0 0 10 0.01 28 4222T 3 C Trp1408Arg NS 0 0 2 b0d;0.01 28 4223G 3 T Trp1408Leu NS 0 0 2 b0d;0.01 28 4234C 3 T Gln1412stop NS 0 0 1 b0d;0.01 29 4297G 3 A Val1433Ile NS 1 0 0 b0d;0.01 29 4319T 3 C Phe1440Ser NS 0 0 1 b0d;0.01 30 4353 afa; 1g 3 t Splice site NS 0 0 1 b0d;0.01 30 4457C 3 T Pro1486Leu NS 0 0 1 b0d;0.01 30 4462T 3 C Cys1488Arg NS 0 0 3 b0d;0.01 30 4463G 3 T Cys1488Phe NS 0 0 2 b0d;0.01 30 4469G 3 A Cys1490Tyr NS 0 0 3 b0d;0.01 30 4531insC FS NS 0 0 2 b0d;0.01 32 4538A 3 G Gln1513Arg NS 0 0 1 b0d;0.01 30 4539 af9; 1g 3 t Splice site NS 0 0 1 b0d;0.01 31 4574T 3 C Leu1525Pro NS 0 0 1 b0d;0.01 33 4733delGTTT FS NS 0 0 1 b0d;0.01 4859delATAACAinsTCC 35 T FS NS 0 0 1 b0d;0.01 36 4909G 3 A Ala1637Thr NS 0 0 1 b0d;0.01 35 4918C 3 T Arg1640Trp NS 0 0 1 b0d;0.01 35 4919G 3 A Arg1640Gln NS 0 0 1 b0d;0.01 35 4954T 3 G Tyr1652Asp NS 0 0 1 b0d;0.01 36 5077G 3 A Val1693Ile NS 0 0 1 b0d;0.01 36 5186T 3 C Leu1729Pro NS 0 0 2 b0d;0.01 36 5206T 3 C Ser1736Pro NS 0 0 1 b0d;0.01 36 5212del11bp FS NS 0 0 1 b0d;0.01 37 5225delTGGTGGTGGGC FS NS 0 0 1 b0d;0.01 del LPA 37 5278del9bp 1760 NS 0 0 1 b0d;0.01 37 5288delG FS NS 0 0 1 b0d;0.01 38 5395A 3 G Asn1799Asp NS 0 0 1 b0d;0.01 38 5451T 3 G Asp1817Glu NS 1 0 4 b0d;0.01 39 5584 af9; 5g 3 a Splice site 0.02 Yes 0 0 6 b0d;0.01 40 5603A 3 T Asn1868Ile 0.0006 No 20 7 79 0.08 40 5651T 3 A Val1884GLu NS 0 0 1 b0d;0.01 40 5657G 3 A Gly1886Glu NS 0 0 1 b0d;0.01 40 5687T 3 A Val1896Asp NS 0 0 1 b0d;0.01 40 5693G 3 A Arg1898His NS 0 0 1 b0d;0.01 40 5714 af9; 5g 3 a Splice site NS 0 0 1 b0d;0.01 42 5843CA 3 TG Pro1948Leu NS 11 7 28 0.04 42 5882G 3 A Gly1961Glu b0d;0.0001 Yes 1 0 43 0.03 43 5908C 3 T Leu1970Phe NS 1 0 1 b0d;0.01 43 5917delG FS NS 0 0 1 b0d;0.01 44 6079C 3 T Leu2027Phe 0.01 Yes 0 0 9 0.01 44 6088C 3 T Arg2030Stop NS 0 0 2 b0d;0.01 44 6089G 3 A Arg2030Gln NS 0 0 1 b0d;0.01 44 6112A 3 T Arg2038Trp NS 0 0 1 b0d;0.01 45 6148A 3 C Val2050Leu NS 1 0 0 b0d;0.01 46 6212A 3 T Tyr2071Phe NS 0 0 1 b0d;0.01 45 6229C 3 T Arg2077Trp NS 0 0 2 b0d;0.01 46 6320G 3 A Arg2107His 0.01 Yes 0 0 10 0.01 46 6383A 3 G His2128Arg NS 0 0 1 b0d;0.01 47 6446G 3 T Arg2149Leu NS 0 0 1 b0d;0.01 47 6449G 3 A Cys2150Tyr NS 0 0 5 b0d;0.01 48 6529G 3 A Asp2177Asn NS 2 0 0 b0d;0.01 48 6686T 3 C Leu2229Pro NS 0 0 1 b0d;0.01 48 6707delTCACACAG FS NS 0 0 1 b0d;0.01 48 6729 af9; 1g 3 a Splice site NS 0 0 1 b0d;0.01 49 6764G 3 T Ser2255Ile 0.009 No 16 4 54 0.06 49 6788G 3 T Arg2263Leu NS 0 0 1 b0d;0.01 (A) The probability under the null hypothesis of similar prevalence of each variant in Stargardt (STGD) compared with non-STGD alleles (two-tailed Fisher`s exact test); (B) compatability of the variant existing in a ratio of 100:1 in STGD to control alleles, calculated using the binomial distribution.

X

ABCA4 p.His2128Arg 11328725:103:5702

status: NEW

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70 Clinical Features of Patients With ABCR Gene Mutations* Patient No./ Sex/Age, y Clinical Phenotype Vision Silent Choroid Central Scotoma MutationOD OS 1/M/19 I 20/200 20/200 ND + Thr300Asn, exon 8 2/M/44 I 20/25 20/15 - + Cys1488Arg, exon 30 3/M/35 I 20/100 20/100 ND + Gly1961Glu, exon 42 Cys2150Tyr, exon 47 4/M/44 I 20/200 20/200 - + Gly1961Glu, exon 42 5/F/28 I 20/80 20/100 - + Gly1961Glu, exon 42 Gly65Glu, exon 3 6/M/36 I 20/25 20/200 - + Gly1961Glu, exon 42 Arg2077Trp, exon 45 7/F/44 I 20/200 20/200 - + Gly1961Glu, exon 42 8/M/41 I 20/200 20/200 - + Gly1961Glu, exon 42 9/F/32 I 20/25 20/30 - + Gly1961Glu, exon 42 10/F/36 I 20/50 20/200 - + Gly1961Glu, exon 42 11/M/31 I 20/200 20/200 - + Gly1961Glu, exon 42 Ala1038Val, exon 21 Leu541Pro, exon 12 12/M/35 I 20/200 20/200 - + Arg2107His, exon 46 Leu1729Pro, exon 36 13/M/22 II 20/200 20/200 + + 1bp del (g), codon 448, exon 10 14/F/9 II 20/200 20/40 ND + 9bp del, codon 1760/1761, exon 37 1bp ins (c), codon 1513, exon 30 15/M/19 II 10/120 10/160 + + 1bp ins (c), codon 1513, exon 30 Ala60Val, exon 3 16/M/25 II 20/200 20/200 + ND Ser974Pro, exon 20 17/F/12 II 20/200 20/200 ND + 2884 del (c), exon 19 18/F/73 II 20/30 20/25 + Paracentral scotoma 5bp del, codon 505, exon 11 19/F/35 II 10/160 10/120 ND + Val849Ala, exon 16 20/F/48 II 20/400 20/400 + +; Mild peripheral restriction Val849Ala, exon 16 Arg2107His, exon 46 21/M/54 II 20/200 20/200 + + Arg2030stop, exon 44 22/M/28 II 20/400 20/400 + + His2128Arg, exon 46 23/F/34 III 10/400 10/225 Diffuse hyperfluorescence ND Arg2038Trp, exon 44 24/F/53 III 10/700 10/600 Diffuse hyperfluorescence and notable choroidal atrophy + Arg1108Cys, exon 22 25/F/54 III 10/350 3/350 Diffuse hyperfluorescence +; Mild concentric restriction Tyr1652Asp, exon 35 Arg2107His, exon 46 26/M/57 III 20/50 20/80 ND ND Splice donor GϾA, exon 24 27/F/65 III 1/225 1/225 Diffuse choroidal atrophy Temporal islands Gly1961Glu, exon 42 frameshift del, codons 1620-1622, exon 35† 28/M/32 III 20/400 20/400 Diffuse hyperfluorescence +; Peripheral restriction Ala1038Val, exon 21 Leu541Pro, exon 12 Donor splice, exon 30 29/M/46 III 10/225 10/225 ND +; Peripheral restriction Trp1408Leu, exon 28 Ser206Arg, exon 6 Arg2107His, exon 46 *M indicates male; F, female; ND, angiography or visual field testing not done; +, present; and -, absent.

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ABCA4 p.His2128Arg 10206579:70:1461

status: NEW

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131 The adjacent H-loop histidine residue (H4032) is essential for ATP hydrolysis in NBDs56,57 and the equivalent mutation, H2128R, in NBD2 of human ABCA4 has been implicated in Stargardt disease (MIM #248200), a lipid deposition disorder.58 5.

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ABCA4 p.His2128Arg 19944402:131:120

status: NEW

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137 T4550A is a missense variant found more frequently in bipolars than controls (p ¼ 0.0097 OR 5.52) with a similar trend in schizophrenia (p ¼ 0.054 OR 3.29) but not depression (p ¼ 0.63 OR 1.18).

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ABCA4 p.His2128Arg 19944402:137:120

status: NEW

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50 Disease-associated nsSNPs at Three Structural Hotspots in Human ABC Transporter NBDs Gene Disease Position ARA motif ABCB11 BRIC2 A570T ABCD1 X-ALD A616V CFTR CF A559T ABCC6 PXE R765Q ABCC8 HHF1 R841G ABCC8 HHF1 R1493Q ABCC8 HHF1 R1493W ABCD1 X-ALD R617C ABCD1 X-ALD R617G ABCD1 X-ALD R617H CFTR CF R560K CFTR CF R560S CFTR CF R560T ABCA1 HDLD1 A1046D ABCB4 ICP A546D C-loop 1 motif ABCC8 HHF1 D1471H ABCC8 HHF1 D1471N CFTR CBAVD G544V ABCC8 HHF1 G1478R C-loop2 motif ABCA4 STGD1 H2128R ABCC8 HHF1 K889T ABCD1 X-ALD R660P ABCD1 X-ALD R660W ABCA1 HDLD2 M1091T ABCA4 STGD1 E2131K ABCA12 LI2 E1539K ABCA4 STGD1 and CORD3 E1122K CFTR CF L610S ABCC8 HHF1 L1543P ABCA1 Colorectal cancer sample; somatic mutation A2109T ABCC9 CMD1O A1513T ABCD1 X-ALD H667D CFTR CF A613T ABCA1 HDLD2 D1099Y ABCD1 X-ALD T668I CFTR CF D614G ABCA4 STGD1 R2139W ABCA4 STGD1 R1129C ABCA4 ARMD2, STGD1, and FFM R1129L Disease abbreviations are as follows: BRIC2, benign recurrent intrahepatic cholestasis type 2; X-ALD, X-linked adrenoleukodystrophy; CF, cystic fibrosis; PXE, Pseudoxanthoma elasticum; HHF1, familial hyperinsulinemic hypoglycemia-1; HDLD1, high density lipoprotein deficiency type 1; ICP, intrahepatic cholestasis of pregnancy; CBAVD, congenital bilateral absence of the vas deferens; STGD1, Stargardt disease type 1; HDLD2, high density lipoprotein deficiency type 2; LI2, ichthyosis lamellar type 2; CORD3, cone-rod dystrophy type 3; CMD1O, cardiomyopathy dilated type 1O; ARMD2, age-related macular degeneration type 2; FFM, fundus flavimaculatus.

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ABCA4 p.His2128Arg 20799350:50:480

status: NEW

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62 Only one mutation affects the conserved histidine, H2128R in ABCA4.

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ABCA4 p.His2128Arg 20799350:62:51

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100 Allele 1 Allele 2 Genotype Exon Nucleotide change Polypeptide change Exon Nucleotide change Polypeptide change Familial case # 1 38 c.5318C>T p.A1773V (D) 38 c.5318C>T p.A1773V (D) Homozygous 2 e NI e e NI e e 3 6 c.634C>T p.R212C (D) 38 c.5318C>T p.A1773V (D) Compound heterozygous 4 23 c.3386G>T p.R1129L (D) 28 c.4139C>T p.P1380L (D) Compound heterozygous 5 e NI e e NI e e 6 38 c.5318C>T p.A1773V (D) 38 c.5318C>T p.A1773V (D) Homozygous 7 e NI e e NI e e 8 16 c.2453G>A p.G818E (D) 28 c.4249_4251 delTTC p.F1417del (D; N) Compound heterozygous 9 38 c.5318C>T p.A1773V (D) 38 c.5318C>T p.A1773V (D) Homozygous Sporadic case # 1 8 c.868C>T p.R290W (D) e IVS8&#fe;1G>A Splicing (D; N) Compound heterozygous 2 38 c.5318C>T p.A1773V (D) - NI - Heterozygous 3 20 c.3041T>G p.L1014R (D) 1; 49 c.52C>T; c.6764G>T p.R18W (D); p.S2255I (B) Compound heterozygous 4 13; 19 c.1804C>T; c.2828G>A p.R602W (D); p.R943Q (U) 16 c.2453G>A p.G818E (D) Compound heterozygous 5 38 c.5324T>A p. I1775N (D; N) 38 c.5324T>A p.I1775N (D; N) Homozygous 6 e NI e e NI e e 7 49 c.6764G>T p.S2255I (B) 49 c.6764 G>T p.S2255I (B) Homozygous 8 19; 40 c.2828 G>A; c.5503A>T p.R943Q (U); p.N1868I (U) 3 c.265G>T p.E89* (D; N) Compound heterozygous 9 38 c.5335T>C p.Y1779H (D;N) 38 c.5335T>C p.Y1779H (D;N) Homozygous 10 16 c.2453G>A p.G818E (D) 16 c.2453G>A p.G818E (D) Homozygous 11 6 c.723A>T p.E241D (D;N) 36 c.5114G>A p.R1705Q (D) Compound heterozygous 12 2 c.71G>A (D) p.R24H e NI e Heterozygous 13 30 c.4537_4538insC p.Q1513Pfs*41 (D; N) e NI e Heterozygous 14 32 c.4667G>C p.R1556T (D; N) 32 c.4667G>C p.R1556T (D; N) Homozygous 15 45 c.6221G>T p.G2074V (D; N) 16 c.2453G>A p.G818E (D) Compound heterozygous 16 16; 41 c.2453G>A; c.5824G>C p. G818E (D); p. E1942Q (B;N) 46 c.6384A>G p.H2128R (D) Compound heterozygous 17 16 c.2453G>A p. G818E (D) e NI e Heterozygous 18 32 c.4653G>A p. W1551* (D; N) e NI e Heterozygous 19 23 c.3386G>T p. R1129L (D) e NI e Heterozygous 20 36 c.5045_5059del GTTGCCATCTGCGTG p.V1682_ V1686del (D; N) 29; 49 c.4328G>A; c.6764G>T p.R1443H (D); p.S2255I (B) Compound heterozygous 21 19 c.2894A>G p.N965S (D) 19 c.2894A>G p.N965S (D) Homozygous 22 e NI e e NI e e STGD accounts for approximately 7% of all retinal dystrophies; it is one of the most common genetic forms of juvenile or early adult onset macular degeneration.

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ABCA4 p.His2128Arg 23419329:100:1762

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119 ABCA4 Exon # Nucleotide change Predicted protein effect Number of alleles Population genotypic frequency in EVS Population allelic frequency in EVS (%) 1 c.52C>T p.R18W 1 TT &#bc; 0/TC &#bc; 2/CC &#bc; 6501 T &#bc; 0.015/C &#bc; 99.985 2 c.71G>A p.R24H 1 AA &#bc; 0/AG &#bc; 1/GG &#bc; 6502 A &#bc; 0.008/G &#bc; 99.992 3 c.265G>T p.E89* (N) 1 NR NR 6 c.634C>T p.R212C 1 TT &#bc; 0/TC &#bc; 2/CC &#bc; 6501 T &#bc; 0.015/C &#bc; 99.985 6 c.723A>T p.E241D (N) 1 NR NR 8 c.868C>T p.R290W 1 NR NR IVS8 IVS8 &#fe; 1G>A Splicing mutation (N) 1 NR NR 13 c.1804C>T p.R602W 1 NR NR 16 c.2453G>A p.G818E 7 NR NR 19 c.2828G>A p.R943Q 2 AA &#bc; 8/AG &#bc; 400/GG &#bc; 6095 A &#bc; 3.199/G &#bc; 96.801 19 c.2894A>G p.N965S 2 GG &#bc; 0/GA &#bc; 1/AA &#bc; 6502 G &#bc; 0.008/A &#bc; 99.992 20 c.3041T>G p.L1014R 1 NR NR 23 c.3386G>T p.R1129L 2 NR NR 28 c.4139C>T p.P1380L 1 TT &#bc; 0/TC &#bc; 2/CC &#bc; 6501 T &#bc; 0.015/C &#bc; 99.985 28 c.4249_4251del TTC p.F1417del (N) 1 NR NR 29 c.4328G>A p.R1443H 1 AA &#bc; 0/AG &#bc; 1/GG &#bc; 6502 A &#bc; 0.008/G &#bc; 99.992 30 c.4537_4538insC p.Q1513Pfs*41 (N) 1 NR NR 32 c.4653G>A p.W1551* (N) 1 NR NR 32 c.4667G>C p.R1556T (N) 2 NR NR 36 c.5044_5058del GTTGCCATCTGCGTG p.V1682_V1686del (N) 1 NR NR 36 c.5114G>A p.R1705Q 1 AA &#bc; 0/AG &#bc; 1/GG &#bc; 6502 A &#bc; 0.008/G &#bc; 99.992 38 c.5318C>T p.A1773V 8 NR NR 38 c.5324T>A p.I1775N (N) 2 NR NR 38 c.5335T>C p.Y1779H (N) 2 NR NR 40 c.5503A>T p.N1868I 1 TT &#bc; 16/TA &#bc; 589/AA &#bc; 5898 T &#bc; 4.775/A &#bc; 95.225 41 c.5824G>C p.E1942Q (N) 1 NR NR 45 c.6221G>T p.G2074V (N) 1 NR NR 46 c.6384A>G p.H2128R 1 NR NR 49 c.6764G>T p.S2255I 4 TT &#bc; 516/TG &#bc; 1473/GG &#bc; 4514 T &#bc; 19.26/G &#bc; 80.74 gold standard for ABCA4 mutational screening.

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ABCA4 p.His2128Arg 23419329:119:1602

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124 The novel p.E1942Q mutation was detected in a heterozygous state and was predict to be a benign variant by PolyPhen2; however, it occurred as a complex allele together with p.G818E and coexisting with p.H2128R in the other allele.

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ABCA4 p.His2128Arg 23419329:124:203

status: NEW

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