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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q8N119: Variant p.Ile285Thr

Matrix metalloproteinase-21
Gene: MMP21
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Variant information Variant position: help 285 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] 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: help From Isoleucine (I) to Threonine (T) at position 285 (I285T, p.Ile285Thr). 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: help Change from medium size and hydrophobic (I) to medium size and polar (T) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -1 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: help In HTX7. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 285 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 569 The length of the canonical sequence.
Location on the sequence: help HFTPPTSDTGISLLKVAVHE I GHVLGLPHTYRTGSIMQPNY 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         HFTPPTSDTGISLLKVAVHEIGHVLGLPHTYRTGSIMQPNY

Mouse                         HFTPLSSDTGISLLKVAVHEIGHVLGLPHTYRVGSIMQPNY

Xenopus laevis                HFTAPSSEHGISLLKVAAHEIGHVLGLSHIHRVGSIMQPNY

Zebrafish                     HFTVPNTGSGISLLKVAVHEIGHVLGLPHIYRPGSIMQPSY
Sequence annotation in neighborhood: help 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.
TypePositionsDescription
Chain 145 – 569 Matrix metalloproteinase-21
Active site 284 – 284
Binding site 283 – 283
Binding site 287 – 287
Binding site 293 – 293



Literature citations
Discovery of four recessive developmental disorders using probabilistic genotype and phenotype matching among 4,125 families.
Akawi N.; McRae J.; Ansari M.; Balasubramanian M.; Blyth M.; Brady A.F.; Clayton S.; Cole T.; Deshpande C.; Fitzgerald T.W.; Foulds N.; Francis R.; Gabriel G.; Gerety S.S.; Goodship J.; Hobson E.; Jones W.D.; Joss S.; King D.; Klena N.; Kumar A.; Lees M.; Lelliott C.; Lord J.; McMullan D.; O'Regan M.; Osio D.; Piombo V.; Prigmore E.; Rajan D.; Rosser E.; Sifrim A.; Smith A.; Swaminathan G.J.; Turnpenny P.; Whitworth J.; Wright C.F.; Firth H.V.; Barrett J.C.; Lo C.W.; FitzPatrick D.R.; Hurles M.E.;
Nat. Genet. 47:1363-1369(2015)
Cited for: INVOLVEMENT IN HTX7; VARIANTS HTX7 TYR-283 AND THR-285; FUNCTION;
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.