UniProtKB/Swiss-Prot P21912: Variant p.Ala3Gly

Succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial
Gene: SDHB
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Variant information Variant position:

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

US 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 Alanine (A) to Glycine (G) at position 3 (A3G, p.Ala3Gly). 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 hydrophobic (A) 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
Variant description:

Found in a patient with a Cowden-like phenotype; uncertain significance; patient cells have increased manganese superoxide dismutase expression and normal levels of reactive oxygen species; 1.2-fold increase in AKT expression and 1.3-fold change in MAPK expression in patient cells. Any additional useful information about the variant.
Other resources:

Links to websites of interest for the variant.

Variant rs11203289 [ dbSNP | Ensembl ]

Sequence information Variant position:

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

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

MA A VVALSLRRRLPATTLGGACL 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                         MAAVVALSLRRRLPATTLG--GAC--------L

Mouse                         MAATVGVSLKRGFPAAVLGRVGL

Rat                           MAAVVGVSLKRGFSATALGRVGL

Pig                           MAAVVAVSLKRWFPATTLG--GA

Bovine                        MAAVVALSLRRRFPAAALG--GA

Chicken                       AAAVVGVSLRRGVPARFLR-AGL

Xenopus laevis                MAAVV-FSLRRSGPVLRLS--GA

Xenopus tropicalis            MAAVV-FSLRRSGPVFRLP--GV

Zebrafish                     -MAAVCFSLSRCCSAVHRPAVTA

Caenorhabditis elegans        LARSARLLHSAELAANAIRAASG

Drosophila                    LATEARQILSRVGSLVARNQMRA

Slime mold                    ---MISNVLKRASVLARSNGIQS

Baker's yeast                 ---MLNVLLRRKAFCLVTK----

Fission yeast                 FSRRIQVLSPFLKHFVNRNA---

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
Transit peptide	1 – 28	Mitochondrion

Literature citations
Germline mutations and variants in the succinate dehydrogenase genes in Cowden and Cowden-like syndromes.
Ni Y.; Zbuk K.M.; Sadler T.; Patocs A.; Lobo G.; Edelman E.; Platzer P.; Orloff M.S.; Waite K.A.; Eng C.;
Am. J. Hum. Genet. 83:261-268(2008)
Cited for: VARIANTS GLY-3 AND PRO-163; CHARACTERIZATION OF VARIANTS GLY-3 AND PRO-163;

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.