UniProtKB/Swiss-Prot P07902: Variant p.Lys285Asn

• Variant information
• Sequence information
• Literature citations
• All

Variant information

Variant position: 285 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 Lysine (K) to Asparagine (N) at position 285 (K285N, p.Lys285Asn). 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 (K) to medium size and polar (N) 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: In GALAC1; severe; impairs protein folding; nearly abolishes enzyme activity. Any additional useful information about the variant.
Other resources: Links to websites of interest for the variant.

• Variant rs111033773 [ dbSNP | Ensembl ]

Sequence information

Variant position: 285 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: 379 The length of the canonical sequence.
Location on the sequence: PELTPAERDDLASIMKKLLT K YDNLFETSFPYSMGWHGAPT 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 – 379	Galactose-1-phosphate uridylyltransferase
Binding site	301 – 301
Helix	269 – 289

Literature citations

Molecular basis of classic galactosemia from the structure of human galactose 1-phosphate uridylyltransferase.
McCorvie T.J.; Kopec J.; Pey A.L.; Fitzpatrick F.; Patel D.; Chalk R.; Shrestha L.; Yue W.W.;
Hum. Mol. Genet. 25:2234-2244(2016)
Cited for: X-RAY CRYSTALLOGRAPHY (1.73 ANGSTROMS) IN COMPLEX WITH GLUCOSE-1-PHOSPHATE; UMP AND ZINC IONS; FUNCTION; PATHWAY; CATALYTIC ACTIVITY; COFACTOR; SUBUNIT; ACTIVE SITE; CHARACTERIZATION OF VARIANT GALAC1 ARG-188 AND ASN-285; Identification of mutations in the galactose-1-phosphate uridyltransferase (GALT) gene in 16 Turkish patients with galactosemia, including a novel mutation of F294Y.
Seyrantepe V.; Ozguc M.; Coskun T.; Ozalp I.; Reichardt J.K.V.;
Hum. Mutat. 13:339-339(1999)
Cited for: VARIANTS GALAC1 LYS-142; ASN-285; TYR-294 AND THR-320; Molecular analysis in newborns from Texas affected with galactosemia.
Yang Y.P.; Corley N.; Garcia-Heras J.;
Hum. Mutat. 19:82-83(2002)
Cited for: VARIANTS GALAC1 ALA-23; LEU-135; MET-138; GLN-184; ARG-188; PRO-195; SER-251; ASN-285; LYS-344 AND ASP-345; VARIANT ASP-314; Functional and structural impact of the most prevalent missense mutations in classic galactosemia.
Coelho A.I.; Trabuco M.; Ramos R.; Silva M.J.; Tavares de Almeida I.; Leandro P.; Rivera I.; Vicente J.B.;
Mol. Genet. Genomic Med. 2:484-496(2014)
Cited for: VARIANTS GALAC1 LEU-135; GLN-148; ASP-175; SER-185; ARG-188; CYS-231; HIS-231; ASN-285 AND ASP-314; CHARACTERIZATION OF VARIANTS GALAC1 LEU-135; ASP-175 AND ARG-188; Clinical and molecular spectra in galactosemic patients from neonatal screening in northeastern Italy: Structural and functional characterization of new variations in the galactose-1-phosphate uridyltransferase (GALT) gene.
Viggiano E.; Marabotti A.; Burlina A.P.; Cazzorla C.; D'Apice M.R.; Giordano L.; Fasan I.; Novelli G.; Facchiano A.; Burlina A.B.;
Gene 559:112-118(2015)
Cited for: VARIANTS GALAC1 PRO-33; ASN-34; VAL-83; THR-142; ARG-188; SER-244; ARG-267; VAL-267; ASP-271; ASN-285; ASP-314 AND TRP-333;