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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O75643: Variant p.Arg1779His

U5 small nuclear ribonucleoprotein 200 kDa helicase
Gene: SNRNP200
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Variant information Variant position: help 1779 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 Histidine (H) at position 1779 (R1779H, p.Arg1779His). 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 medium size and polar (H) 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
Variant description: help In RP33. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 1779 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 2136 The length of the canonical sequence.
Location on the sequence: help FLYRRMTQNPNYYNLQGISH R HLSDHLSELVEQTLSDLEQS 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                         FLYRRMTQNPNYYNLQGISHRHLSDHLSELVEQTLSDLEQS

Mouse                         FLYRRMTQNPNYYNLQGISHRHLSDHLSELVEQTLSDLEQS

Rat                           FLYRRMTQNPNYYNLQGISHRHLSDHLSELVEQTLSDLEQS

Caenorhabditis elegans        LLYRRMTQNPNYYNLQGTTHRHLSDALSELVELTLKDLENS

Drosophila                    FLYRRLTQNPNYYNLQGVTHRHLSDHLSELVENTLSDLEQS
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 – 2136 U5 small nuclear ribonucleoprotein 200 kDa helicase
Region 395 – 2129 Interaction with C9orf78 and WBP4
Region 1282 – 2136 Interaction with TSSC4
Modified residue 1765 – 1765 Phosphothreonine
Alternative sequence 561 – 2071 Missing. In isoform 2.
Helix 1778 – 1798



Literature citations
Contribution of SNRNP200 sequence variations to retinitis pigmentosa.
Zhang X.; Lai T.Y.; Chiang S.W.; Tam P.O.; Liu D.T.; Chan C.K.; Pang C.P.; Zhao C.; Chen L.J.;
Eye 27:1204-1213(2013)
Cited for: VARIANTS RP33 ARG-502; VAL-698 AND HIS-1779; VARIANT THR-1995;
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.