Variant information:

(Click the titles to show more information.)

Variant position: 521

The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant: Polymorphism

The variants are classified into three categories: Disease, Polymorphism and Unclassified.

• Disease: Variants have been found in patients and disease-association is reported in literature. However, this classification is not a definitive assessment of variant pathogenicity.
• Polymorphism: No disease-association has been reported.
• Unclassified: Variants have been found in patients but disease-association remains unclear.

Residue change: From Arginine (R) to Lysine (K) at position 521 (R521K, p.Arg521Lys).

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: Similar physico-chemical property. Both residues are large size and basic.

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

Other resources: 

Links to websites of interest for the variant.

• GeneReviews
• NIEHS-SNPs
• Wikipedia; EGFR entry
• Variant rs2227983 [ dbSNP | Ensembl ]

Sequence information:

(Click the titles to show more information.)

Variant position: 521

The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length: 1210

The length of the canonical sequence.

Location on the sequence:  ATGQVCHALCSPEGCWGPEP  R DCVSCRNVSRGRECVDKCNL

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                         ATGQVCHALCSPEGCWGPEPRDCVSCRNVSRGRECVDKCNL

Mouse                         AVNHVCNPLCSSEGCWGPEPRDCVSCQNVSRGRECVEKCNI

Drosophila                    KNGTICSDQCNEDGCWGAGTDQCLTCKNFNFNGTCIADCGY

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	25 – 1210	Epidermal growth factor receptor
Topological domain	25 – 645	Extracellular
Repeat	390 – 600	Approximate
Glycosylation	528 – 528	N-linked (GlcNAc...)
Disulfide bond	510 – 523
Alternative sequence	406 – 1210	Missing. In isoform 2.
Helix	520 – 522

Literature citations

Submission
NIEHS SNPs program;
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; VARIANTS GLN-98; ARG-266; LYS-521; ILE-674; GLY-962 AND PRO-988;

Patterns of somatic mutation in human cancer genomes.
Greenman C.; Stephens P.; Smith R.; Dalgliesh G.L.; Hunter C.; Bignell G.; Davies H.; Teague J.; Butler A.; Stevens C.; Edkins S.; O'Meara S.; Vastrik I.; Schmidt E.E.; Avis T.; Barthorpe S.; Bhamra G.; Buck G.; Choudhury B.; Clements J.; Cole J.; Dicks E.; Forbes S.; Gray K.; Halliday K.; Harrison R.; Hills K.; Hinton J.; Jenkinson A.; Jones D.; Menzies A.; Mironenko T.; Perry J.; Raine K.; Richardson D.; Shepherd R.; Small A.; Tofts C.; Varian J.; Webb T.; West S.; Widaa S.; Yates A.; Cahill D.P.; Louis D.N.; Goldstraw P.; Nicholson A.G.; Brasseur F.; Looijenga L.; Weber B.L.; Chiew Y.-E.; DeFazio A.; Greaves M.F.; Green A.R.; Campbell P.; Birney E.; Easton D.F.; Chenevix-Trench G.; Tan M.-H.; Khoo S.K.; Teh B.T.; Yuen S.T.; Leung S.Y.; Wooster R.; Futreal P.A.; Stratton M.R.;
Nature 446:153-158(2007)
Cited for: VARIANTS [LARGE SCALE ANALYSIS] LYS-521; ARG-1034 AND VAL-1210;