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UniProtKB/Swiss-Prot Q13873: Variant p.Pro138Ala

Bone morphogenetic protein receptor type-2
Gene: BMPR2
Variant information

Variant position:  138
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Unclassified
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 Proline (P) to Alanine (A) at position 138 (P138A, p.Pro138Ala).
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 hydrophobic (P) to small size and hydrophobic (A)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -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

Involvement in disease:  Pulmonary hypertension, primary, 1 (PPH1) [MIM:178600]: A rare disorder characterized by plexiform lesions of proliferating endothelial cells in pulmonary arterioles. The lesions lead to elevated pulmonary arterial pression, right ventricular failure, and death. The disease can occur from infancy throughout life and it has a mean age at onset of 36 years. Penetrance is reduced. Although familial pulmonary hypertension is rare, cases secondary to known etiologies are more common and include those associated with the appetite-suppressant drugs. {ECO:0000269|PubMed:10903931, ECO:0000269|PubMed:10973254, ECO:0000269|PubMed:11015450, ECO:0000269|PubMed:11115378, ECO:0000269|PubMed:12358323, ECO:0000269|PubMed:15965979, ECO:0000269|PubMed:24936649, ECO:0000269|PubMed:25187962, ECO:0000269|PubMed:28507310}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In PPH1; unknown pathological significance; unchanged subcellular localization.
Any additional useful information about the variant.



Sequence information

Variant position:  138
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1038
The length of the canonical sequence.

Location on the sequence:   CSTDLCNVNFTENFPPPDTT  P LSPPHSFNRDETIIIALASV
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                         CSTDLCNVNFTENFPPPDTTPLSPPHSFNRDETIIIALASV

Mouse                         CSTDLCNVNFTENFPPPDTTPLSPPHSFNRDETIIIALASV

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 27 – 1038 Bone morphogenetic protein receptor type-2
Topological domain 27 – 150 Extracellular
Glycosylation 126 – 126 N-linked (GlcNAc...) asparagine


Literature citations

Molecular and functional characterization of the BMPR2 gene in Pulmonary Arterial Hypertension.
Pousada G.; Lupo V.; Castro-Sanchez S.; Alvarez-Satta M.; Sanchez-Monteagudo A.; Baloira A.; Espinos C.; Valverde D.;
Sci. Rep. 7:1923-1923(2017)
Cited for: VARIANTS PPH1 ARG-64; PHE-84; HIS-109; ALA-138; 218-TYR--LEU-1038 DEL; GLY-248; 298-TRP--LEU-1038 DEL AND ARG-467; CHARACTERIZATION OF VARIANTS PPH1 ARG-64; LEU-77; TYR-87; LEU-92; HIS-109; ALA-138; PRO-162; 218-TYR--LEU-1038 DEL; GLY-248; ASN-264; 298-TRP--LEU-1038 DEL; MET-341 AND ARG-467; CHARACTERIZATION OF VARIANT ASN-775;

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.