UniProtKB/Swiss-Prot P11166: Variant p.Arg223Pro

• Variant information
• Sequence information
• Literature citations
• All

Variant information

Variant position: 223 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 Arginine (R) to Proline (P) at position 223 (R223P, p.Arg223Pro). 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 large size and basic (R) to medium size and hydrophobic (P) 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
Variant description: In EIG12; mild phenotype; reduced transporter activity; impaired phosphorylation by PKC. Any additional useful information about the variant.
Other resources: Links to websites of interest for the variant.

• Variant rs397514564 [ dbSNP | Ensembl ]

Sequence information

Variant position: 223 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: 492 The length of the canonical sequence.
Location on the sequence: VLPFCPESPRFLLINRNEEN R AKSVLKKLRGTADVTHDLQE 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.
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 – 492	Solute carrier family 2, facilitated glucose transporter member 1
Topological domain	207 – 271	Cytoplasmic
Modified residue	226 – 226	Phosphoserine; by PKC/PRKCB
Mutagenesis	204 – 204	L -> C. Abolishes glucose transport.
Mutagenesis	205 – 205	P -> C. Abolishes glucose transport.
Mutagenesis	226 – 226	S -> A. Abolishes phosphorylation by PKA, leading to impaired response to TPA.
Helix	221 – 231

Literature citations

A protein kinase C phosphorylation motif in GLUT1 affects glucose transport and is mutated in GLUT1 deficiency syndrome.
Lee E.E.; Ma J.; Sacharidou A.; Mi W.; Salato V.K.; Nguyen N.; Jiang Y.; Pascual J.M.; North P.E.; Shaul P.W.; Mettlen M.; Wang R.C.;
Mol. Cell 58:845-853(2015)
Cited for: FUNCTION; TRANSPORTER ACTIVITY; BIOPHYSICOCHEMICAL PROPERTIES; SUBCELLULAR LOCATION; PHOSPHORYLATION AT SER-226; MUTAGENESIS OF SER-226; CHARACTERIZATION OF VARIANTS EIG12 PRO-223 AND GLN-223; CHARACTERIZATION OF VARIANT GLUT1DS1 TRP-223; Early-onset absence epilepsy caused by mutations in the glucose transporter GLUT1.
Suls A.; Mullen S.A.; Weber Y.G.; Verhaert K.; Ceulemans B.; Guerrini R.; Wuttke T.V.; Salvo-Vargas A.; Deprez L.; Claes L.R.; Jordanova A.; Berkovic S.F.; Lerche H.; De Jonghe P.; Scheffer I.E.;
Ann. Neurol. 66:415-419(2009)
Cited for: VARIANT EIG12 PRO-223; VARIANTS GLUT1DS2 CYS-126 AND LEU-324; CHARACTERIZATION OF VARIANT EIG12 PRO-223; CHARACTERIZATION OF VARIANTS GLUT1DS2 CYS-126 AND LEU-324; Absence epilepsies with widely variable onset are a key feature of familial GLUT1 deficiency.
Mullen S.A.; Suls A.; De Jonghe P.; Berkovic S.F.; Scheffer I.E.;
Neurology 75:432-440(2010)
Cited for: VARIANTS GLUT1DS2 ILE-95; PRO-223; SER-314 AND LEU-324; VARIANTS GLUT1DS1 ASP-91 AND HIS-126;