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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P41181: Variant p.Arg187Cys

Aquaporin-2
Gene: AQP2
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Variant information Variant position: help 187 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 Cysteine (C) at position 187 (R187C, p.Arg187Cys). 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 (C) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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

Variant description: help In NDI2; loss of water channel activity; mutant protein does not fold properly. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 187 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 271 The length of the canonical sequence.
Location on the sequence: help SVALGHLLGIHYTGCSMNPA R SLAPAVVTGKFDDHWVFWIG 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                         SVALGHLLGIHYTGCSMNPARSLAPAVVTGKFDDHWVFWIG

Mouse                         SVTLGHLLGIYFTGCSMNPARSLAPAVVTGKFDDHWVFWIG

Rat                           SVTLGHLLGIYFTGCSMNPARSLAPAVVTGKFDDHWVFWIG

Bovine                        SVALGHLLGIHYTGCSMNPARSLAPAIVTGKFDDHWVFWIG

Sheep                         SVALGHLLGIHYTGCSMNPARSLAPAIVTGKFDDHWVFWIG

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 – 271 Aquaporin-2
Intramembrane 181 – 193 Discontinuously helical
Helix 185 – 195



Literature citations
Requirement of human renal water channel aquaporin-2 for vasopressin-dependent concentration of urine.
Deen P.M.T.; Verdijk M.A.J.; Knoers V.V.A.M.; Wieringa B.; Monnens L.A.H.; van Os C.H.; van Oost B.A.;
Science 264:92-94(1994)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; FUNCTION; SUBCELLULAR LOCATION; VARIANTS NDI2 CYS-187 AND PRO-216; CHARACTERIZATION OF VARIANTS NDI2 CYS-187 AND PRO-216; Patients with autosomal nephrogenic diabetes insipidus homozygous for mutations in the aquaporin 2 water-channel gene.
van Lieburg A.F.; Verdijk M.A.J.; Knoers V.V.A.M.; van Essen A.J.; Proesmans W.; Mallmann R.; Monnens L.A.H.; van Oost B.A.; van Os C.H.; Deen P.M.T.;
Am. J. Hum. Genet. 55:648-652(1994)
Cited for: NUCLEOTIDE SEQUENCE [MRNA]; FUNCTION; SUBCELLULAR LOCATION; VARIANTS NDI2 ARG-64; CYS-187 AND PRO-216; CHARACTERIZATION OF VARIANT NDI2 ARG-64; A novel mechanism in recessive nephrogenic diabetes insipidus: wild-type aquaporin-2 rescues the apical membrane expression of intracellularly retained AQP2-P262L.
de Mattia F.; Savelkoul P.J.M.; Bichet D.G.; Kamsteeg E.-J.; Konings I.B.M.; Marr N.; Arthus M.-F.; Lonergan M.; van Os C.H.; van der Sluijs P.; Robertson G.; Deen P.M.T.;
Hum. Mol. Genet. 13:3045-3056(2004)
Cited for: VARIANTS NDI2 CYS-187; THR-190 AND LEU-262; CHARACTERIZATION OF VARIANTS NDI2 CYS-187; THR-190 AND LEU-262; FUNCTION; SUBCELLULAR LOCATION; MUTAGENESIS OF PRO-262;
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.