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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9HAN9: Variant p.Val9Met

Nicotinamide/nicotinic acid mononucleotide adenylyltransferase 1
Gene: NMNAT1
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Variant information Variant position: help 9 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 Valine (V) to Methionine (M) at position 9 (V9M, p.Val9Met). 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 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: help 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
Variant description: help In LCA9; does not affect nuclear localization; results in significantly reduced enzymatic activity. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 9 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 279 The length of the canonical sequence.
Location on the sequence: help MENSEKTE V VLLACGSFNPITNMHLRLFE 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                         MENSEKTEVVLLACGSFNPITNMHLRLFE

Mouse                         MDSSKKTEVVLLACGSFNPITNMHLRLFE

Bovine                        MENSEKTEVVLLACGSFNPITNMHLRLFE
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 – 279 Nicotinamide/nicotinic acid mononucleotide adenylyltransferase 1
Binding site 15 – 15
Binding site 15 – 15
Binding site 16 – 16
Binding site 16 – 16
Binding site 17 – 17
Binding site 23 – 23
Binding site 24 – 24
Beta strand 7 – 15



Literature citations
NMNAT1 mutations cause Leber congenital amaurosis.
Falk M.J.; Zhang Q.; Nakamaru-Ogiso E.; Kannabiran C.; Fonseca-Kelly Z.; Chakarova C.; Audo I.; Mackay D.S.; Zeitz C.; Borman A.D.; Staniszewska M.; Shukla R.; Palavalli L.; Mohand-Said S.; Waseem N.H.; Jalali S.; Perin J.C.; Place E.; Ostrovsky J.; Xiao R.; Bhattacharya S.S.; Consugar M.; Webster A.R.; Sahel J.A.; Moore A.T.; Berson E.L.; Liu Q.; Gai X.; Pierce E.A.;
Nat. Genet. 44:1040-1045(2012)
Cited for: VARIANTS LCA9 MET-9; THR-13; ASN-20; GLY-33; VAL-54; TRP-66; VAL-69; HIS-72; GLY-98; ARG-156; MET-184; CYS-237 AND LYS-257; CHARACTERIZATION OF VARIANTS LCA9 MET-9; TRP-66 AND CYS-237;
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.