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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9Y5I7: Variant p.Gly121Arg

Claudin-16
Gene: CLDN16
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Variant information Variant position: help 121 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 Glycine (G) to Arginine (R) at position 121 (G121R, p.Gly121Arg). 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 glycine (G) to large size and basic (R) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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: help In HOMG3; localizes at tight junctions when coexpressed with CLDN19; displays almost normal interaction with CLDN19 yet it prevents functional synergistic effects on ion selectivity; impairs paracellular magnesium- and sodium-selective transport; may be retained intracellularly and targeted to lysosomes. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 121 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 235 The length of the canonical sequence.
Location on the sequence: help DCVKFLPDEPYIKVRICFVA G ATLLIAGTPGIIGSVWYAVD 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                         DCVKFLPDEPYIKVRICFVAGATLLIAGTPGIIGSVWYAVD

Mouse                         DCVKFLPDDPQIKVRLCFVAGTTLLIAGTPGIIGSVWYAVD

Rat                           DCVKFLPDEPHIKVRLCFVAGTVLLIAGTPGIIGSVWYAVD

Bovine                        DCVKFLPDEPYIKVRISFVAGTTLLIAGAPGIIGSVWYAVD
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 – 235 Claudin-16
Transmembrane 116 – 136 Helical



Literature citations
Paracellin-1, a renal tight junction protein required for paracellular Mg2+ resorption.
Simon D.B.; Lu Y.; Choate K.A.; Velazquez H.; Al-Sabban E.; Praga M.; Casari G.; Bettinelli A.; Colussi G.; Rodriguez-Soriano J.; McCredie D.; Milford D.; Sanjad S.; Lifton R.P.;
Science 285:103-106(1999)
Cited for: NUCLEOTIDE SEQUENCE [MRNA]; VARIANTS HOMG3 PRO-97; ARG-121; ASP-128; CYS-162; ASP-163; PHE-165 AND ARG-169; FUNCTION; SUBCELLULAR LOCATION; TISSUE SPECIFICITY; Paracellin-1 and the modulation of ion selectivity of tight junctions.
Hou J.; Paul D.L.; Goodenough D.A.;
J. Cell Sci. 118:5109-5118(2005)
Cited for: FUNCTION; TRANSPORTER ACTIVITY; SUBCELLULAR LOCATION; DOMAIN; MUTAGENESIS OF ASP-27; ASP-34; ASP-35; GLU-38; LYS-42; ARG-44; GLU-49; ASP-56; ARG-59; ASP-62; GLU-63; ASP-65; GLU-70; LYS-74 AND ARG-79; CHARACTERIZATION OF VARIANTS HOMG3 PRO-75; LEU-79; PHE-81; PRO-97; ARG-121; ASP-128; THR-139; THR-146; CYS-162; ASP-163 AND PRO-165; VARIANT HOMG3 ARG-169; Disease-associated mutations affect intracellular traffic and paracellular Mg2+ transport function of Claudin-16.
Kausalya P.J.; Amasheh S.; Guenzel D.; Wurps H.; Mueller D.; Fromm M.; Hunziker W.;
J. Clin. Invest. 116:878-891(2006)
Cited for: FUNCTION; TRANSPORTER ACTIVITY; SUBCELLULAR LOCATION; CHARACTERIZATION OF VARIANTS HOMG3 47-TRP--VAL-235 DEL; VAL-69; ASP-71; PRO-75; 79-ARG--VAL-235 DEL; LEU-79; TRP-81; PHE-81; VAL-92; PRO-97; ARG-121; ALA-128; THR-139; THR-146; CYS-162; ASP-163; PHE-165; PRO-165; ARG-169 AND ARG-233; Claudin-16 and claudin-19 interact and form a cation-selective tight junction complex.
Hou J.; Renigunta A.; Konrad M.; Gomes A.S.; Schneeberger E.E.; Paul D.L.; Waldegger S.; Goodenough D.A.;
J. Clin. Invest. 118:619-628(2008)
Cited for: FUNCTION; TRANSPORTER ACTIVITY; SUBUNIT; INTERACTION WITH CLDN19; SUBCELLULAR LOCATION; CHARACTERIZATION OF VARIANTS HOMG3 PRO-75; PHE-81; ARG-121; THR-139 AND CYS-162;
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.