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UniProtKB/Swiss-Prot O00187: Variant p.His155Arg

Mannan-binding lectin serine protease 2
Gene: MASP2
Variant information

Variant position:  155
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 implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Histidine (H) to Arginine (R) at position 155 (H155R, p.His155Arg).
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 medium size and polar (H) to large size and basic (R)
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.



Sequence information

Variant position:  155
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  686
The length of the canonical sequence.

Location on the sequence:   AAEDIDECQVAPGEAPTCDH  H CHNHLGGFYCSCRAGYVLHR
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                         AAEDIDECQVAPGEAPTCDHHCHNHLGGFYCSCRAGYVLHR

Mouse                         AAEDVDECRVSLGDSVPCDHYCHNYLGGYYCSCRAGYVLHQ

Rat                           AAEDVDECRTSLGDSVPCDHYCHNYLGGYYCSCRVGYILHQ

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.

TypePositionsDescription
Chain 16 – 686 Mannan-binding lectin serine protease 2
Chain 16 – 444 Mannan-binding lectin serine protease 2 A chain
Domain 138 – 181 EGF-like; calcium-binding
Metal binding 138 – 138 Calcium 2
Metal binding 139 – 139 Calcium 2; via carbonyl oxygen
Metal binding 141 – 141 Calcium 2
Metal binding 158 – 158 Calcium 2
Metal binding 159 – 159 Calcium 2; via carbonyl oxygen
Metal binding 162 – 162 Calcium 2; via carbonyl oxygen
Modified residue 158 – 158 (3R)-3-hydroxyasparagine
Disulfide bond 142 – 156
Disulfide bond 152 – 165
Beta strand 151 – 159


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.