UniProtKB/Swiss-Prot P35670: Variant p.Arg778Leu

Copper-transporting ATPase 2
Gene: ATP7B
Chromosomal location: 13q14.3
Variant information

Variant position:  778
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants have been found in patients and disease-association is reported in literature. However, this classification is not a definitive assessment of variant pathogenicity.
  • Polymorphism: No disease-association has been reported.
  • Unclassified: Variants have been found in patients but disease-association remains unclear.

Residue change:  From Arginine (R) to Leucine (L) at position 778 (R778L, p.Arg778Leu).
Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.

Physico-chemical properties:  Change from large size and basic (R) to medium size and hydrophobic (L)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -2
The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Variant description:  In WD; most common mutation.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  778
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1465
The length of the canonical sequence.

Location on the sequence:   RSPVTFFDTPPMLFVFIALG  R WLEHLAKSKTSEALAKLMSL
The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.

Residue conservation: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         RSPVTFFDTPPMLFVFIALGRWLEHLAKSKTSEALAKLMSL

Mouse                         KSPVTFFDTPPMLFVFIALGRWLEHVAKSKTSEALAKLMSL

Rat                           KSPVTFFDTPPMLFVFIALGRWLEHVAKSKTSEALAKLMSL

Sheep                         RSPVTFFDTPPMLFVFIALGRWLEHVVKSKTSEALARLMSL

Sequence annotation in neighborhood:  
The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.

TypePositionsDescription
Chain 1 – 1465 Copper-transporting ATPase 2
Transmembrane 765 – 785 Helical
Alternative sequence 624 – 785 Missing. In isoform 2.


Literature citations

High frequency of two mutations in codon 778 in exon 8 of the ATP7B gene in Taiwanese families with Wilson disease.
Chuang L.-M.; Wu H.-P.; Jang M.-H.; Wang T.-R.; Sue W.-C.; Lin B.J.; Cox D.W.; Tai T.-Y.;
J. Med. Genet. 33:521-523(1996)
Cited for: VARIANTS WD GLN-778 AND LEU-778;

Identification of three novel mutations and a high frequency of the Arg778Leu mutation in Korean patients with Wilson disease.
Kim E.K.; Yoo O.J.; Song K.Y.; Yoo H.W.; Choi S.Y.; Cho S.W.; Hahn S.H.;
Hum. Mutat. 11:275-278(1998)
Cited for: VARIANTS WD LEU-778; VAL-874 AND PHE-1083; VARIANTS ARG-832; ILE-864; MET-1109 AND ALA-1140;

Mutations of ATP7B gene in Wilson disease in Japan: identification of nine mutations and lack of clear founder effect in a Japanese population.
Yamaguchi A.; Matsuura A.; Arashima S.; Kikuchi Y.; Kikuchi K.;
Hum. Mutat. Suppl. 1:S320-S322(1998)
Cited for: VARIANTS WD LEU-778; VAL-874; GLY-919; SER-1186; ALA-1267 AND SER-1270;

Molecular analysis and diagnosis in Japanese patients with Wilson's disease.
Shimizu N.; Nakazono H.; Takeshita Y.; Ikeda C.; Fujii H.; Watanabe A.; Yamaguchi Y.; Hemmi H.; Shimatake H.; Aoki T.;
Pediatr. Int. 41:409-413(1999)
Cited for: VARIANTS WD LEU-778; VAL-874; GLY-919; ILE-1029; VAL-1035; SER-1186 AND ASN-1222;

Mutational analysis of ATP7B and genotype-phenotype correlation in Japanese with Wilson's disease.
Okada T.; Shiono Y.; Hayashi H.; Satoh H.; Sawada T.; Suzuki A.; Takeda Y.; Yano M.; Michitaka K.; Onji M.; Mabuchi H.;
Hum. Mutat. 15:454-462(2000)
Cited for: VARIANTS WD ILE-769; LEU-778; TRP-778; VAL-874; GLY-919; THR-1003; PHE-1083; SER-1186; ALA-1267; SER-1270; THR-1336 AND PRO-1373; VARIANTS ALA-406; LEU-456 AND ALA-1140;

Novel mutations of the ATP7B gene in Japanese patients with Wilson disease.
Kusuda Y.; Hamaguchi K.; Mori T.; Shin R.; Seike M.; Sakata T.;
J. Hum. Genet. 45:86-91(2000)
Cited for: VARIANTS WD LEU-778; VAL-874 AND VAL-1297 DEL; VARIANTS LEU-290; ALA-406; LEU-456; ARG-832; ALA-1140 AND GLU-1407;

Identification of novel mutations and the three most common mutations in the human ATP7B gene of Korean patients with Wilson disease.
Yoo H.-W.;
Genet. Med. 4:43S-48S(2002)
Cited for: VARIANTS WD HIS-768; LEU-778; VAL-874; PHE-1083; SER-1168; ILE-1255; ALA-1267 AND SER-1270;

Two families with Wilson disease in which siblings showed different phenotypes.
Takeshita Y.; Shimizu N.; Yamaguchi Y.; Nakazono H.; Saitou M.; Fujikawa Y.; Aoki T.;
J. Hum. Genet. 47:543-547(2002)
Cited for: VARIANTS WD LEU-778; VAL-874 AND GLY-919;

Mutation spectrum and polymorphisms in ATP7B identified on direct sequencing of all exons in Chinese Han and Hui ethnic patients with Wilson's disease.
Gu Y.-H.; Kodama H.; Du S.-L.; Gu Q.-J.; Sun H.-J.; Ushijima H.;
Clin. Genet. 64:479-484(2003)
Cited for: VARIANTS WD VAL-85; GLY-765; LEU-778; MET-890; GLY-919; MET-935; TYR-975; LEU-992; ARG-1098; THR-1148; LYS-1173 AND ASN-1248; VARIANTS ASP-14; ALA-406; LEU-456; ARG-832; ALA-1140; ASN-1143 AND SER-1245;

Correlation of ATP7B genotype with phenotype in Chinese patients with Wilson disease.
Liu X.-Q.; Zhang Y.-F.; Liu T.-T.; Hsiao K.-J.; Zhang J.-M.; Gu X.-F.; Bao K.-R.; Yu L.-H.; Wang M.-X.;
World J. Gastroenterol. 10:590-593(2004)
Cited for: VARIANTS WD LEU-778; ASP-943; ILE-1106; ALA-1140 AND MET-1216;

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.