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UniProtKB/Swiss-Prot Q5FBB7: Variant p.Lys23Glu

Shugoshin 1
Gene: SGO1
Variant information

Variant position:  23
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Lysine (K) to Glutamate (E) at position 23 (K23E, p.Lys23Glu).
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:  Change from large size and basic (K) to medium size and acidic (E)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  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

Involvement in disease:  Chronic atrial and intestinal dysrhythmia (CAID) [MIM:616201]: A disease characterized by dysregulation of the cardiac sinus node resulting in sick sinus syndrome, in association with chronic intestinal pseudo-obstruction, a disorder of gastrointestinal motility in which intestinal obstruction occurs in the absence of a mechanical obstacle. {ECO:0000269|PubMed:25282101}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In CAID; patient fibroblasts exhibit significantly faster cell proliferation than controls; during mitosis the mutant protein is localized in an ordered fashion around the centromeres but display a rather homogeneous cytoplasmic localization pattern.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  23
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  561
The length of the canonical sequence.

Location on the sequence:   KERCLKKSFQDSLEDIKKRM  K EKRNKNLAEIGKRRSFIAAP
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: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         KERCLKK--------SFQDSLEDIKKRMKEKRNKNLAEIGKRRSFIAAP

Mouse                         KERCQKR--------SFQDTLEDIKNRMKEKRNKNLAGIGK

Xenopus laevis                KERCPKQ--------AFQDSLEDIKERMKEKRIKKLAKVAT

Caenorhabditis elegans        DAKTAQS--------IFGGIVAAKKRPSKEVPEPTINFKSA

Drosophila                    GSKVEQQ---------YKLLNAEL---MDQVQKQRLEIGEY

Baker's yeast                 KRKIAPNKESSRRTVSHDDLTPQIQEFQNLMDLESQKVENI

Fission yeast                 --------------MNFQFINSNINN------EDKLPMESL

Sequence annotation in neighborhood:  
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 – 561 Shugoshin 1
Region 1 – 176 Necessary for interaction with PPP2CA and PPP2R1A
Coiled coil 7 – 89
Modified residue 14 – 14 Phosphoserine; by NEK2
Mutagenesis 14 – 14 S -> A. Loss of phosphorylation and presence of misaligned chromosomes; when associated with A-507.


Literature citations

Mutations in SGOL1 cause a novel cohesinopathy affecting heart and gut rhythm.
Chetaille P.; Preuss C.; Burkhard S.; Cote J.M.; Houde C.; Castilloux J.; Piche J.; Gosset N.; Leclerc S.; Wuennemann F.; Thibeault M.; Gagnon C.; Galli A.; Tuck E.; Hickson G.R.; El Amine N.; Boufaied I.; Lemyre E.; de Santa Barbara P.; Faure S.; Jonzon A.; Cameron M.; Dietz H.C.; Gallo-McFarlane E.; Benson D.W.; Moreau C.; Labuda D.; Zhan S.H.; Shen Y.; Jomphe M.; Jones S.J.; Bakkers J.; Andelfinger G.;
Nat. Genet. 46:1245-1249(2014)
Cited for: INVOLVEMENT IN CAID; VARIANT CAID GLU-23; CHARACTERIZATION OF VARIANT CAID GLU-23;

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.