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UniProtKB/Swiss-Prot P04792: Variant p.Lys141Gln

Heat shock protein beta-1
Gene: HSPB1
Chromosomal location: 7q11.2-q22
Variant information

Variant position:  141
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 Lysine (K) to Glutamine (Q) at position 141 (K141Q, p.Lys141Gln).
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 (Q)
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:  Neuronopathy, distal hereditary motor, 2B (HMN2B) [MIM:608634]: A neuromuscular disorder. Distal hereditary motor neuronopathies constitute a heterogeneous group of neuromuscular disorders caused by selective degeneration of motor neurons in the anterior horn of the spinal cord, without sensory deficit in the posterior horn. The overall clinical picture consists of a classical distal muscular atrophy syndrome in the legs without clinical sensory loss. The disease starts with weakness and wasting of distal muscles of the anterior tibial and peroneal compartments of the legs. Later on, weakness and atrophy may expand to the proximal muscles of the lower limbs and/or to the distal upper limbs. {ECO:0000269|PubMed:15122254, ECO:0000269|PubMed:18832141, ECO:0000269|PubMed:18952241, ECO:0000269|PubMed:20178975, ECO:0000269|PubMed:20870250, ECO:0000269|PubMed:22176143, ECO:0000269|PubMed:23643870, ECO:0000269|PubMed:23728742, ECO:0000269|PubMed:23948568, ECO:0000269|PubMed:25965061, ECO:0000269|PubMed:28144995}. 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 HMN2B; decreased thermal stability; changed protein structure; no effect on homooligomerization; changed heterooligomerization with HSPB6; slightly decreased function in chaperone-mediated protein folding.
Any additional useful information about the variant.



Sequence information

Variant position:  141
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  205
The length of the canonical sequence.

Location on the sequence:   TGKHEERQDEHGYISRCFTR  K YTLPPGVDPTQVSSSLSPEG
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                         TGKHEERQDEHGYISRCFTRKYTLPPGVDPTQVSSSLSPEG

                              TGKHEERQDEHGYISRRLTPKYTLPPGVDPTLVSSSLSPEG

Mouse                         TGKHEERQDEHGYISRCFTRKYTLPPGVDPTLVSSSLSPEG

Rat                           TGKHEERQDEHGYISRCFTRKYTLPPGVDPTLVSSSLSPEG

Pig                           TGKHEERQDEHGFISRCFTRKYTLPPGVDPTQVSSSLSPEG

Bovine                        TGKHEERQDEHGYISRCFTRKYTLPPGVDPTLVSSSLSPEG

Chicken                       TGKHEEKQDEHGFISRCFTRKYTLPPGVEATAVRSSLSPDG

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 1 – 205 Heat shock protein beta-1
Domain 76 – 184 sHSP
Region 70 – 205 Interaction with TGFB1I1
Modified residue 123 – 123 N6-acetyllysine
Beta strand 136 – 143


Literature citations

A clinical phenotype of distal hereditary motor neuronopathy type II with a novel HSPB1 mutation.
Ikeda Y.; Abe A.; Ishida C.; Takahashi K.; Hayasaka K.; Yamada M.;
J. Neurol. Sci. 277:9-12(2009)
Cited for: VARIANT HMN2B GLN-141;

Physico-chemical properties of R140G and K141Q mutants of human small heat shock protein HspB1 associated with hereditary peripheral neuropathies.
Nefedova V.V.; Datskevich P.N.; Sudnitsyna M.V.; Strelkov S.V.; Gusev N.B.;
Biochimie 95:1582-1592(2013)
Cited for: CHARACTERIZATION OF VARIANTS HMN2B GLY-140 AND GLN-141;

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.