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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9H1K1: Variant p.Ala12Val

Iron-sulfur cluster assembly enzyme ISCU
Gene: ISCU
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Variant information Variant position: help 12 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LB/B 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: help From Alanine (A) to Valine (V) at position 12 (A12V, p.Ala12Val). 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: help Change from small size and hydrophobic (A) to medium size and hydrophobic (V) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 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

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


Sequence information Variant position: help 12 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 167 The length of the canonical sequence.
Location on the sequence: help MAAAGAFRLRR A ASALLLRSPRLPARELSAPA 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences.
Human                         MAAAGAFRLRRAASALLLRSPRLPARELSAPA

Mouse                         AAATGAGRLRRAASALLLRSPRLPARELSAPA

Sequence annotation in neighborhood: help 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
Transit peptide 1 – 34 Mitochondrion
Modified residue 14 – 14 Phosphoserine; by MTOR
Alternative sequence 1 – 38 MAAAGAFRLRRAASALLLRSPRLPARELSAPARLYHKK -> MVLIDMSVDLSTQ. In isoform 2.
Mutagenesis 14 – 14 S -> A. Loss of phosphorylation. Does not affect phosphorylation.



Literature citations
Distinct iron-sulfur cluster assembly complexes exist in the cytosol and mitochondria of human cells.
Tong W.-H.; Rouault T.;
EMBO J. 19:5692-5700(2000)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS 1 AND 2); SUBCELLULAR LOCATION; INTERACTION WITH NFS1; TISSUE SPECIFICITY; VARIANT VAL-12; The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).
The MGC Project Team;
Genome Res. 14:2121-2127(2004)
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1); VARIANT VAL-12; A quantitative atlas of mitotic phosphorylation.
Dephoure N.; Zhou C.; Villen J.; Beausoleil S.A.; Bakalarski C.E.; Elledge S.J.; Gygi S.P.;
Proc. Natl. Acad. Sci. U.S.A. 105:10762-10767(2008)
Cited for: VARIANT [LARGE SCALE ANALYSIS] VAL-12; IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]; Lys-N and trypsin cover complementary parts of the phosphoproteome in a refined SCX-based approach.
Gauci S.; Helbig A.O.; Slijper M.; Krijgsveld J.; Heck A.J.; Mohammed S.;
Anal. Chem. 81:4493-4501(2009)
Cited for: VARIANT [LARGE SCALE ANALYSIS] VAL-12; IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]; Quantitative phosphoproteomics reveals widespread full phosphorylation site occupancy during mitosis.
Olsen J.V.; Vermeulen M.; Santamaria A.; Kumar C.; Miller M.L.; Jensen L.J.; Gnad F.; Cox J.; Jensen T.S.; Nigg E.A.; Brunak S.; Mann M.;
Sci. Signal. 3:RA3-RA3(2010)
Cited for: VARIANT [LARGE SCALE ANALYSIS] VAL-12; IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]; Toward a comprehensive characterization of a human cancer cell phosphoproteome.
Zhou H.; Di Palma S.; Preisinger C.; Peng M.; Polat A.N.; Heck A.J.; Mohammed S.;
J. Proteome Res. 12:260-271(2013)
Cited for: VARIANT [LARGE SCALE ANALYSIS] VAL-12; IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]; An enzyme assisted RP-RPLC approach for in-depth analysis of human liver phosphoproteome.
Bian Y.; Song C.; Cheng K.; Dong M.; Wang F.; Huang J.; Sun D.; Wang L.; Ye M.; Zou H.;
J. Proteomics 96:253-262(2014)
Cited for: VARIANT [LARGE SCALE ANALYSIS] VAL-12; IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS];
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.