UniProtKB/Swiss-Prot P41968: Variant p.Ile298Ser

Melanocortin receptor 3
Gene: MC3R
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Variant information Variant position:

298 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant:

LB/B 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 Isoleucine (I) to Serine (S) at position 298 (I298S, p.Ile298Ser). 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 medium size and hydrophobic (I) to small size and polar (S) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score:

-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
Polymorphism:

Genetic variations in MC3R define the body mass index quantitative trait locus 9 (BMIQ9) [MIM:602025]. Variance in body mass index is a susceptibility factor for obesity. Additional information on the polymorphism described.
Variant description:

Risk factor for obesity; in vitro expression studies demonstrate that the mutation causes complete loss of function; transfected cells show diffuse cytoplasmic staining indicating intracellular retention of the receptor. Any additional useful information about the variant.
Other resources:

Links to websites of interest for the variant.

Variant rs121913556 [ dbSNP | Ensembl ]

Sequence information Variant position:

298 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length:

323 The length of the canonical sequence.
Location on the sequence:

TAHFNTYLVLIMCNSVIDPL I YAFRSLELRNTFREILCGCN 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                         TAHFNTYLVLIMCNSVIDPLIYAFRSLELRNTFREILCGCN

Mouse                         TAHFNTYLVLIMCNSVIDPLIYAFRSLELRNTFKEILCGCN

Rat                           TAHFNTYLVLIMCNSVIDPLIYAFRSLELRNTFKEILCGCN

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	1 – 323	Melanocortin receptor 3
Transmembrane	278 – 301	Helical; Name=7
Lipidation	315 – 315	S-palmitoyl cysteine

Literature citations
Sporadic mutations in melanocortin receptor 3 in morbid obese individuals.
Mencarelli M.; Walker G.E.; Maestrini S.; Alberti L.; Verti B.; Brunani A.; Petroni M.L.; Tagliaferri M.; Liuzzi A.; Di Blasio A.M.;
Eur. J. Hum. Genet. 16:581-586(2008)
Cited for: VARIANT SER-298; CHARACTERIZATION OF VARIANT SER-298; ASSOCIATION WITH SUSCEPTIBILITY TO OBESITY;

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.