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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P49366: Variant p.Asn173Ser

Deoxyhypusine synthase
Gene: DHPS
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Variant information Variant position: help 173 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 Asparagine (N) to Serine (S) at position 173 (N173S, p.Asn173Ser). 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 medium size and polar (N) to small size and polar (S) 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 NEDSSWI; decreased deoxyhypusine synthase activity. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 173 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 369 The length of the canonical sequence.
Location on the sequence: help LRGKELRENGINRIGNLLVP N ENYCKFEDWLMPILDQMVME 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                         LRGKELRENGINRIGNLLVPNENYCKFEDWLMPILDQMVME

Mouse                         LRGKELRESGINRIGNLLVPNDNYCKFEDWLMPILDQMVLE

Rat                           LRGKELRENGINRIGNLLVPNDNYCKFEDWLMPILDQMVQE

Bovine                        LRGKELRENGINRIGNLLVPNDNYCKFEDWLMPILDQMVLE

Caenorhabditis elegans        MDGAKLRSNGMNRAGNVLIPNDNYCAFEDWLMPILDECLVE

Drosophila                    LSGRDLRERGINRIGNLLVPNDNYCKFEDWVMPLLDEMLEE

Slime mold                    LEGEKLRRKGLNRIGNLLVPNDNYCKFEDWIMPILDQMVEE

Baker's yeast                 LKGKSLRDQGMNRIGNLLVPNDNYCKFEEWIVPILDKMLEE

Fission yeast                 LDGKNLRAKGLNRIGNLIVPNDNYCRFEEWIFPILNKMVEE
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 – 369 Deoxyhypusine synthase
Helix 173 – 196



Literature citations
Recessive rare variants in deoxyhypusine synthase, an enzyme involved in the synthesis of hypusine, are associated with a neurodevelopmental disorder.
Ganapathi M.; Padgett L.R.; Yamada K.; Devinsky O.; Willaert R.; Person R.; Au P.B.; Tagoe J.; McDonald M.; Karlowicz D.; Wolf B.; Lee J.; Shen Y.; Okur V.; Deng L.; LeDuc C.A.; Wang J.; Hanner A.; Mirmira R.G.; Park M.H.; Mastracci T.L.; Chung W.K.;
Am. J. Hum. Genet. 104:287-298(2019)
Cited for: FUNCTION; CATALYTIC ACTIVITY; PATHWAY; VARIANTS NEDSSWI SER-173 AND 305-TYR-ILE-306 DEL; CHARACTERIZATION OF VARIANTS NEDSSWI SER-173 AND 305-TYR-ILE-306 DEL; INVOLVEMENT IN NEDSSWI;
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.