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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9H222: Variant p.Arg419His

ATP-binding cassette sub-family G member 5
Gene: ABCG5
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Variant information Variant position: help 419 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] 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: help From Arginine (R) to Histidine (H) at position 419 (R419H, p.Arg419His). 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: help Change from large size and basic (R) to medium size and polar (H) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 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: help In STSL2; loss of normal maturation of glycan chains. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 419 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 651 The length of the canonical sequence.
Location on the sequence: help FLLFFVLRVRSNVLKGAIQD R VGLLYQFVGATPYTGMLNAV 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         FLLFF------------------------------------------------VLRV-------------------------------RSNVLKGAIQD----------------------------------------------------------------------------------------------RVGLLYQFVGAT--------------------------------------------------------------------------------------------------------------------------------PYTGM--------LNAV

Mouse                         FLIFY------------------------------------

Rat                           FLIFY------------------------------------

Slime mold                    YIVFFYSVCFFALKYLNFEDKKSKLAVKKLKKKKKVIVCKE
Sequence annotation in neighborhood: help 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 – 651 ATP-binding cassette sub-family G member 5
Topological domain 405 – 421 Extracellular
Domain 388 – 645 ABC transmembrane type-2
Mutagenesis 432 – 432 Y -> A. Strongly decreases cholesterol secretion into bile.
Helix 415 – 453



Literature citations
Identification of a gene, ABCG5, important in the regulation of dietary cholesterol absorption.
Lee M.-H.; Lu K.; Hazard S.; Yu H.; Shulenin S.; Hidaka H.; Kojima H.; Allikmets R.; Sakuma N.; Pegoraro R.; Srivastava A.K.; Salen G.; Dean M.; Patel S.B.;
Nat. Genet. 27:79-83(2001)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1); VARIANTS STSL2 HIS-389; HIS-419 AND PRO-419; VARIANT GLU-604; FUNCTION; TISSUE SPECIFICITY; Two genes that map to the STSL locus cause sitosterolemia: genomic structure and spectrum of mutations involving sterolin-1 and sterolin-2, encoded by ABCG5 and ABCG8, respectively.
Lu K.; Lee M.-H.; Hazard S.; Brooks-Wilson A.; Hidaka H.; Kojima H.; Ose L.; Stalenhoef A.F.H.; Mietinnen T.; Bjorkhem I.; Bruckert E.; Pandya A.; Brewer H.B. Jr.; Salen G.; Dean M.; Srivastava A.K.; Patel S.B.;
Am. J. Hum. Genet. 69:278-290(2001)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 1-88 (ISOFORM 1); VARIANTS STSL2 GLN-146; HIS-389; PRO-419; HIS-419 AND SER-550; VARIANT GLU-604; Missense mutations in ABCG5 and ABCG8 disrupt heterodimerization and trafficking.
Graf G.A.; Cohen J.C.; Hobbs H.H.;
J. Biol. Chem. 279:24881-24888(2004)
Cited for: CHARACTERIZATION OF VARIANTS STSL2 GLN-146; HIS-389; PRO-419; HIS-419 AND LYS-437; FUNCTION;
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.