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UniProtKB/Swiss-Prot Q16637 : Variant p.Ser262Gly
Survival motor neuron protein
Gene: SMN2
Variant information
Variant position: 262 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: LP/P [Disclaimer : Variants classification is intended for research purposes only, not for clinical and diagnostic use . The label disease variant is assigned according to literature reports on probable disease-association that can be based on theoretical reasons. This label must not be considered as a definitive proof for the pathogenic role of a variant. ]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: From Serine (S) to Glycine (G) at position 262 (S262G, p.Ser262Gly).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: Change from small size and polar (S) to glycine (G)The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: 0The 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: In SMA3.Any additional useful information about the variant.
Other resources: Links to websites of interest for the variant.
Sequence information
Variant position: 262 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: 294 The length of the canonical sequence.
Location on the sequence:
IIPPPPPICPDSLDDADALG
S MLISWYMSGYHTGYYMGFRQ
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: The multiple alignment of the region surrounding the variant against various orthologous sequences.
Human IIPPPPPICPDSLDDADA----LGS MLISWYMSGYHTGYYMGFRQ
IIPPPPPICPDSLDDADA----LGS MLISWYMSGYHTGYYM
Mouse IIPPPPPISPDCLDDTDA----LGS MLISWYMSGYHTGYYM
Rat IIPPPPPISPDCLDDTDA----LGS MLISWYMSGYHTGYYM
Bovine MIPPPPPICPDSLDDADA----LGS MLISWYMSGYHTGYYM
Cat IIPPPPPICPDSLDDADA----LGS MLISWYMSGYHTGYYM
Drosophila VMPPMPPVPPMIVGQGDGAEQDFVA MLTAWYMSGYYTGLYQ
Fission yeast FMEVPPPIRGLTYDET------YKK LIMSWYYAGYYTGLAE
Sequence annotation in neighborhood: 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.
Type Positions Description
Chain
2 – 294
Survival motor neuron protein
Region
240 – 267
P2 (binding site for SNRPB)
Region
252 – 280
Involved in homooligomerization
Mutagenesis
260 – 260
L -> S. Impairs homooligomerization.
Mutagenesis
263 – 263
M -> RTA. Impairs homooligomerization and GEMIN8 binding.
Mutagenesis
264 – 264
L -> A. Impairs homooligomerization.
Mutagenesis
266 – 266
S -> P. Impairs homooligomerization and GEMIN8 binding.
Mutagenesis
267 – 267
W -> A. Impairs homooligomerization.
Mutagenesis
268 – 268
Y -> A. Impairs homooligomerization.
Mutagenesis
271 – 271
G -> A. Impairs homooligomerization.
Mutagenesis
272 – 272
Y -> A. Impairs homooligomerization.
Mutagenesis
273 – 273
H -> R. Impairs GEMIN8 binding.
Mutagenesis
274 – 274
T -> A. Impairs homooligomerization.
Mutagenesis
275 – 275
G -> A. Impairs homooligomerization.
Mutagenesis
279 – 279
G -> E. Impairs homooligomerization.
Literature citations
Molecular and functional analysis of intragenic SMN1 mutations in patients with spinal muscular atrophy.
Sun Y.; Grimmler M.; Schwarzer V.; Schoenen F.; Fischer U.; Wirth B.;
Hum. Mutat. 25:64-71(2005)
Cited for: VARIANTS SMA1/SMA2/SMA3 ASN-30; VAL-44; ARG-95; GLY-111; GLY-262; CYS-272 AND ILE-274; CHARACTERIZATION OF VARIANTS SMA1/SMA2/SMA3 ASN-30; VAL-44; ARG-95 AND GLY-111;
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.