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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O60931: Variant p.Met287Ile

Cystinosin
Gene: CTNS
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Variant information Variant position: help 287 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 Methionine (M) to Isoleucine (I) at position 287 (M287I, p.Met287Ile). 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 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: 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 CTNS. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 287 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 367 The length of the canonical sequence.
Location on the sequence: help FCFSYIKLAVTLVKYFPQAY M NFYYKSTEGWSIGNVLLDFT 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                         FCFSYIKLAVTLVKYFPQAYMNFYYKSTEGWSIGNVLLDFT

Mouse                         FCFSYIKLIITLIKYFPQAYMNFYYKSTKGWSIGGVLLDFT

Bovine                        FCFSYIKLAVTLVKYFPQAYMNFHYKSTEGWSIGNVLLDFT

Caenorhabditis elegans        TSLSYIKMAVTCCKYFPQAYFNYTRKSTVGWSIGNIMLDFT

Drosophila                    YYCSYVKLTITIIKYVPQALMNYRRKSTSGWSIGNILLDFT

Slime mold                    NYYSYVKLFITFIKYIPQAYLNFKNKSTSGWSVHNVLLDFS
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 23 – 367 Cystinosin
Transmembrane 264 – 289 Helical
Domain 263 – 328 PQ-loop 2
Binding site 273 – 273
Binding site 280 – 280
Binding site 281 – 281
Binding site 301 – 301
Binding site 305 – 305 protonated residue following cystine-binding
Binding site 305 – 305
Mutagenesis 270 – 270 S -> T. Gain-of-function mutant that shows higher transport of cystine.
Mutagenesis 273 – 273 K -> Q. Abolished cystine transport.
Mutagenesis 274 – 274 L -> F. Gain-of-function mutant that shows higher transport of cystine.
Mutagenesis 280 – 288 Missing. In delta(A) mutant; abolished localization to the lysosome; when associated with deletion of 362-G--L-366.
Mutagenesis 280 – 280 K -> R. Abolished cystine transport.
Mutagenesis 281 – 281 Y -> F. Strongly decreased cystine transport. Decreased midpoint potential. Accelerated the time course.
Mutagenesis 284 – 284 Q -> A. Increased cystine uptake activity.
Mutagenesis 286 – 289 YMNF -> AAAA. In mu(b) mutant; does not abolish localization to the lysosome; when associated with deletion of 362-G--L-366.
Mutagenesis 301 – 301 N -> A. Strongly decreased cystine transport.
Mutagenesis 305 – 305 D -> E. Abolished steady-state transport current.
Mutagenesis 305 – 305 D -> N. Abolished cystine transport. Abolished transient cxurrents. Abolished steady-state transport current.
Helix 264 – 290



Literature citations
Mutational spectrum of the CTNS gene in Italy.
Mason S.; Pepe G.; Dall'Amico R.; Tartaglia S.; Casciani S.; Greco M.; Bencivenga P.; Murer L.; Rizzoni G.; Tenconi R.; Clementi M.;
Eur. J. Hum. Genet. 11:503-508(2003)
Cited for: VARIANTS CTNS ILE-287; ARG-308; ARG-337 AND ARG-339; VARIANT ILE-260;
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.