UniProtKB/Swiss-Prot O15393: Variant p.Lys449Asn

Transmembrane protease serine 2
Gene: TMPRSS2
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Variant information Variant position:

449 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 Lysine (K) to Asparagine (N) at position 449 (K449N, p.Lys449Asn). 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
Other resources:

Links to websites of interest for the variant.

Variant rs1056602 [ dbSNP | Ensembl ]

Sequence information Variant position:

449 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:

FLQGNVDSCQGDSGGPLVTS K NNIWWLIGDTSWGSGCAKAY 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                         FLQGNVDSCQGDSGGPLVTSKNNIWWLIGDTSWGSGCAKAY

Mouse                         FLQGSVDSCQGDSGGPLVTLKNGIWWLIGDTSWGSGCAKAL

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	256 – 492	Transmembrane protease serine 2 catalytic chain
Topological domain	106 – 492	Extracellular
Domain	256 – 492	Peptidase S1
Region	340 – 470	HKU1-CoV S protein-binding
Active site	441 – 441	Charge relay system
Disulfide bond	437 – 465
Mutagenesis	430 – 430	L -> R. No effect on catalytic activity. Abolishes HKU1-CoV viral entry.
Mutagenesis	431 – 431	Q -> A. No effect on catalytic activity or HKU1-CoV viral entry.
Mutagenesis	433 – 433	N -> A. No effect on catalytic activity or HKU1-CoV viral entry.
Mutagenesis	441 – 441	S -> A. Loss of activity. No effect on HKU1-CoV viral entry.
Mutagenesis	461 – 461	W -> A. No effect on catalytic activity. Abolishes HKU1-CoV S protein-binding and viral entry.
Mutagenesis	463 – 463	S -> ATYF. No effect on catalytic activity. Reduces HKU1-CoV viral entry.
Mutagenesis	467 – 467	K -> A. No effect on catalytic activity. Reduces HKU1-CoV viral entry.
Mutagenesis	468 – 468	A -> P. No effect on HKU1-CoV viral entry.
Mutagenesis	469 – 469	Y -> ANL. No effect on catalytic activity. Reduces HKU1-CoV viral entry.
Beta strand	444 – 449

Literature citations
No reference for the current variant in UniProtKB/Swiss-Prot.

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.