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UniProtKB/Swiss-Prot P02730: Variant p.Pro854Leu

Band 3 anion transport protein
Gene: SLC4A1
Variant information

Variant position:  854
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LB/B
The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change:  From Proline (P) to Leucine (L) at position 854 (P854L, p.Pro854Leu).
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:  Similar physico-chemical property. Both residues are medium size and hydrophobic.
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -3
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

Polymorphism:  SLC4A1 is responsible for the Diego blood group system [MIM:110500]. The molecular basis of the Di(a)=Di1/Di(b)/Di2 blood group antigens is a single variation in position 854; Leu-854 corresponds to Di(a) and Pro-854 to Di(b). The molecular basis of the Wr(a)=Di3/Wr(b)/Di4 blood group antigens is a single variation in position 658; Lys-658 corresponds to Wr(a) and Glu-658 to Wr(b). The blood group antigens Wd(a)=Di5 (Waldner-type) has Met-557; Rb(a)=Di6 has Leu-548 and WARR=Di7 has Ile-552.SLC4A1 is responsible for the Swann blood group system (SW) [MIM:601550]. Sw(a+) has a Gln or a Trp at position 646 and Sw(a-) has an Arg. - SLC4A1 is responsible for the Froese blood group system (FR) [MIM:601551]. FR(a+) has a Lys at position 480 and FR(a-) has a Glu. - Genetic variations in SLC4A1 are involved in resistance to malaria [MIM:611162]. -
Additional information on the polymorphism described.

Variant description:  In Di(a)/Memphis-II antigen.
Any additional useful information about the variant.

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

Sequence information

Variant position:  854
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  911
The length of the canonical sequence.

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.





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.

Chain 1 – 911 Band 3 anion transport protein
Intramembrane 839 – 869 Discontinuously helical
Lipidation 843 – 843 S-palmitoyl cysteine
Helix 854 – 858

Literature citations

Band 3 Memphis variant II. Altered stilbene disulfonate binding and the Diego (Dia) blood group antigen are associated with the human erythrocyte band 3 mutation Pro-854-->Leu.
Bruce L.J.; Anstee D.J.; Spring F.A.; Tanner M.J.;
J. Biol. Chem. 269:16155-16158(1994)

Characteristic features of the genotype and phenotype of hereditary spherocytosis in the Japanese population.
Yawata Y.; Kanzaki A.; Yawata A.; Doerfler W.; Oezcan R.; Eber S.W.;
Int. J. Hematol. 71:118-135(2000)
Cited for: VARIANTS SPH4 ARG-130; ARG-455; ARG-714; TRP-760; GLN-760; HIS-808; ARG-837 AND MET-837; VARIANTS ALA-38; GLU-56; ASP-72 AND LEU-854;

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.