Table 2 Overview of molecular outcome and predictive effects of alleles in TYR, OCA2, TYRP1 and SLC45A2 genes.

From: Molecular outcomes, clinical consequences, and genetic diagnosis of Oculocutaneous Albinism in Pakistani population

Families

Variant

Effect on protein

Allele frequency

Polyphen-2

Mutation Taster

SIFT

PK

1000 genome

NHLBI10−4

ExAC 10−6

TYR

PKAB115

c.164 G > C

p.(Cys55Ser)

0/180

0.000

0

8.2

Probably damaging

Disease causing

Damaging

PKAB174

c.223 G > T

p.(Asp75Tyr)

0/176

0

0

0

Probably damaging

Disease causing

Damaging

PKAB200

c.585 G > A

p.(Trp195*)

0/186

0

1.53

8.2

PKAB66, PKAB76, PKAB141, PKAB142,  PKAB147

c.649 C > T

p.(Arg217Trp)

0

1.53

197.9

Probably damaging

Polymorphism

Tolerated

PKAB118, PKAB120,  PKAB143, PKAB145,  PKAB165, PKAB185,  PKAB189, PKAB194,  LUAB05, LUAB08, LUAB19,  PKAB204

c.832 C > T

p.(Arg278*)

0

0

190.0

PKAB128, PKAB154

c.896 G > A

p.(Arg299His)

0

0

74.2

Probably damaging

Disease causing

Damaging

PKAB138

c.943–948delTCAGCT

p.(315–316delSerAla)

0

0

0

PKAB105, PKAB183,  PKAB186, PKAB188

c.1037–7 T > A

Splicing error

0

15.38

0

LUAB01

c.1037–18 T > G

Splicing error

0/176

0

0

16.7

PKAB197

c.1037 G > A

p.(Gly346Glu)

 

0

     

PKAB119

c.1147 G > A

p.(Asp383Asn)

0

0

165

Probably damaging

Disease causing

Damaging

PKAB130

c.1184 + 2 T > C

Splicing error

0/178

0

0

8.2

PKAB193

c.1204 C > T

p.(Arg402*)

0

0

49.84

PKAB64, PKAB168

Exons 4–5 deletion

Frame shift

0/180

0

0

 

PKAB81, PKAB106,  PKAB107, PKAB140,  PKAB184, PKAB191,  LUAB03, LUAB19,  GUAB01

c.1255 G > A

p.(Gly419Arg)

 

0

0

33.12

Probably damaging

Disease causing

Damaging

OCA2

PKAB070

Exons 3–14 deletion

Frame shift

0/176

0

0

0

PKAB069, PKAB77

Exons 7–8 deletion

Frame shift

0/180

0

0

0

LUAB04

c.987 C > AGA

p.(Gln330Aspfs*2)

0/184

0

0

0

PKAB127, PKAB132,  PKAB133, PKAB134,  PKAB135, PKAB177,  LUAB07, GUAB03

c.1045–15 T > G

Splicing error

 

0

 

41.36

LUAB02

c.1056 A > C

p.(Arg352Ser)

0/182

0

0

0

Probably damaging

Disease causing

Damaging

PKAB136

c.1064 C > T

p.(Ala355Val)

0/184

0.001

0

289.2

Probably damaging

Disease causing

Tolerated

GUAB02

c.1075 G > C

p.(Gly359Arg)

0/176

0

0

0

Probably damaging

Disease causing

Damaging

PKAB144

c.1182 + 2 T > TT

Splicing error

0/180

0

0

0

PKAB148

c.1211 C > T

p.(Thr404Met)

0

7.69

74.17

Probably damaging

Disease causing

Damaging

LUAB06

c.1322 A > G

p.(Asp441Gly)

0/178

0

1.53

16.74

Probably damaging

Disease causing

Tolerated

PKAB172, PKAB187,  GUAB06, LUAB17

c.1456 G > T

p.(Asp486Tyr)

0

0

16.74

Probably damaging

Disease causing

Damaging

PKAB122

c.1922 C > T

p.(Ser641Leu)

0/184

0

0

0

Probably damaging

Disease causing

Damaging

LUAB10

c.1951 + 4 A > G

Splicing error

 

0

0

0

PKAB137

Exon 19 deletion

Frame shift

0/174

0

0

0

PKAB121

Exons 20–24 deletion

Frame shift

0/176

0

0

0

PKAB116

Exons 22–24 deletion

Frame shift

0/180

0

0

0

LUAB09

c.2228 C > T

p.(Pro743Leu)

0

0

90.78

Probably damaging

Disease causing

Damaging

PKAB170

c.2360 C > A

p.(Ala787Glu)

0/182

0

0

0

Probably damaging

Disease causing

Damaging

PKAB125

c.2360 C > T

p.(Ala787Val)

0

0

24.78

Probably damaging

Disease causing

Damaging

TYRP1

PKAB166

c.256 G > T

p.(Asp86Tyr)

0/180

0

0

0

Probably damaging

Disease causing

Damaging

PKAB164, PKAB192,  PKAB205

c.1067 G > A

p.(Arg356Gln)

0

0

25.50

Probably damaging

Disease causing

Damaging

PKAB146

c.1534 C > T

p.(Glu512*)

0/184

0

0

16.53

SLC45A2

GUAB04, GUAB05

c.1532 C > T

p.(Ala511Val)

0

0

8.2

Probably damaging

Disease causing

Damaging

  1. Novel mutations found in this study are in bold. PK (Pakistani Control).