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UniProtKB/Swiss-Prot P49675: Variant p.Arg182Leu

Steroidogenic acute regulatory protein, mitochondrial
Gene: STAR
Variant information

Variant position:  182
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LP/P [Disclaimer]
The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change:  From Arginine (R) to Leucine (L) at position 182 (R182L, p.Arg182Leu).
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 (R) to medium size and hydrophobic (L)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -2
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 AH1; partial loss of activity.
Any additional useful information about the variant.

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



Sequence information

Variant position:  182
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  285
The length of the canonical sequence.

Location on the sequence:   KDTFITHELAAEAAGNLVGP  R DFVSVRCAKRRGSTCVLAGM
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                         KD-----------TFITHELAAEAAGNLVG---------------------------------PRDFVSVRCAKRRGSTCVLAGM

Mouse                         KD-----------TVITHELAAAAAGNLVG-----------

Rat                           KD-----------TVITHELAAAAAGNLVG-----------

Pig                           KD-----------TVITHELAAEAAGNLVG-----------

Bovine                        KD-----------TVITHELAAEVAGNLVG-----------

Sheep                         KD-----------TIITHELAAEAAGNLVG-----------

Horse                         KD-----------TVITHELAAESAGNLVG-----------

Chicken                       KD-----------TLITHETAAAPPGNIVG-----------

Xenopus laevis                KD-----------TVITHEKAAETPGNIVG-----------

Zebrafish                     QE-----------TMITHEISAETPGNVVG-----------

Drosophila                    STFGSGNSSGSGADQLAHYVADLVGGKMNGAVIQSLSGPLA

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 64 – 285 Steroidogenic acute regulatory protein, mitochondrial
Domain 67 – 280 START
Modified residue 195 – 195 Phosphoserine; by PKA
Beta strand 182 – 192


Literature citations

The pathophysiology and genetics of congenital lipoid adrenal hyperplasia.
Bose H.S.; Sugawara T.; Strauss J.F. III; Miller W.L.;
N. Engl. J. Med. 335:1870-1878(1996)
Cited for: VARIANTS AH1 GLY-169; LYS-169; LEU-182; VAL-218; ARG-272 DEL AND PRO-275; CHARACTERIZATION OF VARIANTS AH1 GLY-169; LYS-169; LEU-182; VAL-218; ARG-272 DEL AND PRO-275; CATALYTIC ACTIVITY;

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.