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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9Y3A5: Variant p.Arg126Thr

Ribosome maturation protein SBDS
Gene: SBDS
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Variant information Variant position: help 126 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 Threonine (T) at position 126 (R126T, p.Arg126Thr). 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 (T) 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 SDS1; strongly reduced release of EIF6 from pre-60S ribosome subunits. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 126 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 250 The length of the canonical sequence.
Location on the sequence: help QMFRDIATIVADKCVNPETK R PYTVILIERAMKDIHYSVKT 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                         QMFRDIATIVADKCVNPETKRPYTVILIERAMKDIHYSVKT

Mouse                         QMFRDIATIVADKCVNPETKRPYTVILIERAMKDIHYSVKP

Rat                           QMFRDIATIVADKCVNPETKRPYTVILIERAMKDIHYSVKP

Bovine                        QMFRDIATIVADKCVNPETKRPYTVILIERAMKDIHYSVKP

Chicken                       QMFRDIATIVADKCVNPETKRPYTVILIERAMKDIHYSVKP

Xenopus laevis                QMFRDIATIVADKCVNPETKRPYTVNLIERAMKDIHYSVKA

Xenopus tropicalis            QMFRDIATIVADKCVNPETKRPYTVNLIERAMKDIHYSVKA

Caenorhabditis elegans        QSLKEVSQLIASMVVNPETKRPVPPSVIDKALQEMHFSLKP

Slime mold                    QTFKDIATIVAEKCVNTETQRPIPVSIIEKAMKDVHYSIHP
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 2 – 250 Ribosome maturation protein SBDS



Literature citations
Mutations in SBDS are associated with Shwachman-Diamond syndrome.
Boocock G.R.B.; Morrison J.A.; Popovic M.; Richards N.; Ellis L.; Durie P.R.; Rommens J.M.;
Nat. Genet. 33:97-101(2003)
Cited for: NUCLEOTIDE SEQUENCE [MRNA]; VARIANTS SDS1 LYS-8; GLY-44; GLU-67; SER-87; THR-126 AND CYS-169; VARIANT THR-212; Uncoupling of GTP hydrolysis from eIF6 release on the ribosome causes Shwachman-Diamond syndrome.
Finch A.J.; Hilcenko C.; Basse N.; Drynan L.F.; Goyenechea B.; Menne T.F.; Gonzalez Fernandez A.; Simpson P.; D'Santos C.S.; Arends M.J.; Donadieu J.; Bellanne-Chantelot C.; Costanzo M.; Boone C.; McKenzie A.N.; Freund S.M.; Warren A.J.;
Genes Dev. 25:917-929(2011)
Cited for: STRUCTURE BY NMR; FUNCTION; CHARACTERIZATION OF VARIANT SDS1 THR-126; MUTAGENESIS OF LYS-151;
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.