UniProtKB/Swiss-Prot Q9NPF0: Variant p.Ser142Gly

CD320 antigen
Gene: CD320
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Variant information Variant position:

142 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 Serine (S) to Glycine (G) at position 142 (S142G, p.Ser142Gly). 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:

0 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

Sequence information Variant position:

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

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

KKLRNCSRLACLAGELRCTL S DDCIPLTWRCDGHPDCPDSS 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                         KKLRNCSRLACLAGELRCTLSDDCIPLTWRCDGHPDCPDSS

Mouse                         KNL-NCSRPPCQESELHCILDDVCIPHTWRCDGHPDCLDSS

Rat                           KNL-NCSRSPCQEGELRCILDDVCIPHTWRCDGHPDCPDSS

Bovine                        KNLLNCGPQSCPEGELCCPLDGVCIPSTWLCDGHRDCSDYS

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	36 – 282	CD320 antigen
Topological domain	36 – 229	Extracellular
Domain	131 – 168	LDL-receptor class A 2
Binding site	150 – 150
Binding site	153 – 153
Binding site	155 – 155
Binding site	157 – 157
Glycosylation	126 – 126	N-linked (GlcNAc...) asparagine
Disulfide bond	132 – 145
Disulfide bond	139 – 158
Beta strand	140 – 143

Literature citations
Positive newborn screen for methylmalonic aciduria identifies the first mutation in TCblR/CD320, the gene for cellular uptake of transcobalamin-bound vitamin B(12).
Quadros E.V.; Lai S.-C.; Nakayama Y.; Sequeira J.M.; Hannibal L.; Wang S.; Jacobsen D.W.; Fedosov S.; Wright E.; Gallagher R.C.; Anastasio N.; Watkins D.; Rosenblatt D.S.;
Hum. Mutat. 31:924-929(2010)
Cited for: FUNCTION; INVOLVEMENT IN MMATC; VARIANT MMATC GLU-88 DEL; CHARACTERIZATION OF VARIANT MMATC GLU-88 DEL; VARIANTS GLY-142 AND ARG-220;

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.