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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P41180: Variant p.Ser122Cys

Extracellular calcium-sensing receptor
Gene: CASR
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Variant information Variant position: help 122 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 Serine (S) to Cysteine (C) at position 122 (S122C, p.Ser122Cys). 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 small size and polar (S) to medium size and polar (C) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -1 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 HYPOC1; increased G-protein coupled receptor signaling pathway. Any additional useful information about the variant.


Sequence information Variant position: help 122 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1078 The length of the canonical sequence.
Location on the sequence: help NTVSKALEATLSFVAQNKID S LNLDEFCNCSEHIPSTIAVV 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                         NTVSKALEATLSFVAQNKIDSLNLDEFCNCSEHIPSTIAVV

Mouse                         NTVSKALEATLSFVAQNKIDSLNLDEFCNCSEHIPSTIAVV

Rat                           NTVSKALEATLSFVAQNKIDSLNLDEFCNCSEHIPSTIAVV

Pig                           NTVSKALEATLSFVAQNKIDSLNLDEFCNCSEHIPSTIAVV

Bovine                        NTVSKALEATLSFVAQNKIDSLNLDEFCNCSEHIPSTIAVV
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 20 – 1078 Extracellular calcium-sensing receptor
Topological domain 20 – 612 Extracellular
Region 22 – 188 Ligand-binding 1 (LB1)
Glycosylation 130 – 130 N-linked (GlcNAc...) asparagine
Disulfide bond 129 – 129 Interchain
Disulfide bond 131 – 131 Interchain
Mutagenesis 102 – 102 N -> I. Abolishes G-protein coupled receptor activity.
Helix 116 – 123



Literature citations
Loss-of-function and gain-of-function mutations of calcium-sensing receptor: functional analysis and the effect of allosteric modulators NPS R-568 and NPS 2143.
Nakamura A.; Hotsubo T.; Kobayashi K.; Mochizuki H.; Ishizu K.; Tajima T.;
J. Clin. Endocrinol. Metab. 98:E1692-E1701(2013)
Cited for: VARIANTS HHC1 THR-110 AND GLY-172; VARIANTS HYPOC1 CYS-122; HIS-569 AND THR-839; FUNCTION; CHARACTERIZATION OF VARIANTS HHC1 THR-110 AND GLY-172; CHARACTERIZATION OF VARIANTS HYPOC1 CYS-122; HIS-569 AND THR-839;
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.