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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9NZB8: Variant p.Arg73Trp

Molybdenum cofactor biosynthesis protein 1
Gene: MOCS1
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Variant information Variant position: help 73 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help 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: help From Arginine (R) to Tryptophan (W) at position 73 (R73W, p.Arg73Trp). 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 large size and basic (R) to large size and aromatic (W) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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: help In MOCODA. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 73 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 636 The length of the canonical sequence.
Location on the sequence: help HAAPFSAFLTDSFGRQHSYL R ISLTEKCNLRCQYCMPEEGV 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                         HAAPFSAFLTDSFGRQHSYLRISLTEKCNLRCQYCMPEEGV

Mouse                         HAAPFSAFLTDSFGRQHSYLRISLTEKCNLRCQYCMPEEGV

Bovine                        HAAPFSAFLTDSFGRHHSYLRISLTERCNLRCQYCMPEEGV

Caenorhabditis elegans        TKGQPPFF--DMFMREHTYLRISLTEKCNFRCLYCMPAEGV

Drosophila                    NSP-----LTDSFGRHHTYLRISLTERCNLRCDYCMPAEGV

Slime mold                    VDDK-KYILTDRFNRHHTYLRISLTERCNLRCKYCMPEEGV
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
Chain 1 – 636 Molybdenum cofactor biosynthesis protein 1
Domain 64 – 277 Radical SAM core
Region 1 – 383 Molybdenum cofactor biosynthesis protein A
Binding site 73 – 73
Binding site 80 – 80
Binding site 84 – 84
Binding site 86 – 86
Binding site 87 – 87
Modified residue 64 – 64 Phosphoserine
Alternative sequence 1 – 87 Missing. In isoform 4 and isoform 7.
Mutagenesis 80 – 80 C -> S. Impairs precursor Z synthesis.
Mutagenesis 84 – 84 C -> S. Impairs precursor Z synthesis.
Mutagenesis 87 – 87 C -> S. Impairs precursor Z synthesis.



Literature citations
Genomic structure and mutational spectrum of the bicistronic MOCS1 gene defective in molybdenum cofactor deficiency type A.
Reiss J.P.; Christensen E.; Kurlemann G.; Zabot M.-T.; Dorche C.;
Hum. Genet. 103:639-644(1998)
Cited for: VARIANTS MOCODA TRP-73; ASP-126; ASP-127; GLN-319 AND GLU-324;
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.