Home  |  Contact

UniProtKB/Swiss-Prot Q16363: Variant p.Pro950Leu

Laminin subunit alpha-4
Gene: LAMA4
Chromosomal location: 6q21
Variant information

Variant position:  950
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
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 Leucine (L) at position 950 (P950L, p.Pro950Leu).
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 medium size and hydrophobic.
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -3
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:  Cardiomyopathy, dilated 1JJ (CMD1JJ) [MIM:615235]: A disorder characterized by ventricular dilation and impaired systolic function, resulting in congestive heart failure and arrhythmia. Patients are at risk of premature death. {ECO:0000269|PubMed:17646580}. 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 CMD1JJ; loss of integrin-binding capacity.
Any additional useful information about the variant.



Sequence information

Variant position:  950
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1823
The length of the canonical sequence.

Location on the sequence:   YFSIVKIERVGKHGKVFLTV  P SLSSTAEEKFIKKGEFSGDD
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                         YFSIVKIERVGKHGKVFLTVPSLSSTAEEKFIKKGEFSGDD

Mouse                         YFSIVKIERVGKHGKVFLTVPSLSSTAEEKFIKKGEFAGDD

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 25 – 1823 Laminin subunit alpha-4
Domain 833 – 1035 Laminin G-like 1
Alternative sequence 121 – 1823 Missing. In isoform 3.


Literature citations

Laminin-alpha4 and integrin-linked kinase mutations cause human cardiomyopathy via simultaneous defects in cardiomyocytes and endothelial cells.
Knoell R.; Postel R.; Wang J.; Kraetzner R.; Hennecke G.; Vacaru A.M.; Vakeel P.; Schubert C.; Murthy K.; Rana B.K.; Kube D.; Knoell G.; Schaefer K.; Hayashi T.; Holm T.; Kimura A.; Schork N.; Toliat M.R.; Nuernberg P.; Schultheiss H.P.; Schaper W.; Schaper J.; Bos E.; Den Hertog J.; van Eeden F.J.; Peters P.J.; Hasenfuss G.; Chien K.R.; Bakkers J.;
Circulation 116:515-525(2007)
Cited for: VARIANT CMD1JJ LEU-950; CHARACTERIZATION OF VARIANT CMD1JJ LEU-950;

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.