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UniProtKB/Swiss-Prot P04792: Variant p.Pro39Leu

Heat shock protein beta-1
Gene: HSPB1
Variant information

Variant position:  39
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 39 (P39L, p.Pro39Leu).
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

Variant description:  In HMN2B and CMT2F; increased aggregation; increased homooligomerization; decreased phosphorylation by MAPKAPK2; changed function in chaperone-mediated protein folding.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  39
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:   FRDWYPHSRLFDQAFGLPRL  P EEWSQWLGGSSWPGYVRPLP
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                         FRDWYP-HSRLFDQAFGLPRLPEEWSQWLGGSSWPGYVRPLP

                              FRDWYPAHSRLFDQAFGLPRLPEEWAQWFGHSGWPGYVRPI

Mouse                         FRDWYPAHSRLFDQAFGVPRLPDEWSQWFSAAGWPGYVRPL

Rat                           FRDWYPAHSRLFDQAFGVPRFPDEWSQWFSSAGWPGYVRPL

Pig                           FRDWYPAHSRLFDQAFGLPRLPEEWSQWLSHSGWPGYVRPL

Bovine                        FRDWYPAHSRLFDQAFGLPRLPEEWSQWLSHSGWPGYVRAL

Chicken                       FRDWYH-GSRLFDQSFGMPHIPEDWYKWPSGSAWPGYFRLL

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
Modified residue 26 – 26 Phosphoserine


Literature citations

Mutations in the HSP27 (HSPB1) gene cause dominant, recessive, and sporadic distal HMN/CMT type 2.
Houlden H.; Laura M.; Wavrant-De Vrieze F.; Blake J.; Wood N.; Reilly M.M.;
Neurology 71:1660-1668(2008)
Cited for: VARIANTS HMN2B LEU-39; ARG-84; MET-99; PHE-135 AND GLY-140;

HSPB1 and HSPB8 in inherited neuropathies: study of an Italian cohort of dHMN and CMT2 patients.
Capponi S.; Geroldi A.; Fossa P.; Grandis M.; Ciotti P.; Gulli R.; Schenone A.; Mandich P.; Bellone E.;
J. Peripher. Nerv. Syst. 16:287-294(2011)
Cited for: VARIANTS HMN2B ARG-34; LYS-41; LEU-136 AND ILE-180; VARIANTS CMT2F LEU-39; LEU-136 AND TRP-188;

Characterization of mutants of human small heat shock protein HspB1 carrying replacements in the n-terminal domain and associated with hereditary motor neuron diseases.
Muranova L.K.; Weeks S.D.; Strelkov S.V.; Gusev N.B.;
PLoS ONE 10:E0126248-E0126248(2015)
Cited for: CHARACTERIZATION OF VARIANTS HMN2B ARG-34; LEU-39 AND LYS-41;

Axonal Neuropathies due to Mutations in Small Heat Shock Proteins: Clinical, Genetic, and Functional Insights into Novel Mutations.
Echaniz-Laguna A.; Geuens T.; Petiot P.; Pereon Y.; Adriaenssens E.; Haidar M.; Capponi S.; Maisonobe T.; Fournier E.; Dubourg O.; Degos B.; Salachas F.; Lenglet T.; Eymard B.; Delmont E.; Pouget J.; Juntas Morales R.; Goizet C.; Latour P.; Timmerman V.; Stojkovic T.;
Hum. Mutat. 38:556-568(2017)
Cited for: VARIANTS HMN2B SER-7; LEU-39; ASP-53; TRP-127; ARG-128; ILE-151; 175-GLN--LYS-205 DEL; ILE-180 AND LEU-187; SUBCELLULAR LOCATION; CHARACTERIZATION OF VARIANTS HMN2B SER-7; ASP-53; ARG-128 AND LEU-187;

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.