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GBE1

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An Error has occurred retrieving Wikidata item for infobox 1,4-alpha-glucan-branching enzyme, also known as brancher enzyme or glycogen-branching enzyme is an enzyme that in humans is encoded by the GBE1 gene.[1]

Function

GBE1 is a glycogen branching enzyme that catalyzes the transfer of alpha-1,4-linked glucosyl units from the outer end of a glycogen chain to an alpha-1,6 position on the same or a neighboring glycogen chain. Branching of the chains is essential to increase the solubility of the glycogen molecule and, consequently, in reducing the osmotic pressure within cells. Highest level of this enzyme are found in liver and muscle.[1]

Clinical significance

Mutations in this gene are associated with glycogen storage disease IV (also known as Andersen's disease).[1]

Model organisms

Model organisms have been used in the study of GBE1 function. A conditional knockout mouse line, called Gbe1tm1a(KOMP)Wtsi[5][6] was generated as part of the International Knockout Mouse Consortium program — a high-throughput mutagenesis project to generate and distribute animal models of disease to interested scientists.[7][8][9]

Male and female animals underwent a standardized phenotypic screen to determine the effects of deletion.[3][10] Twenty six tests were carried out on mutant mice and two significant abnormalities were observed.[3] No homozygous mutant embryos were identified during gestation, and therefore none survived until weaning. The remaining tests were carried out on heterozygous mutant adult mice; no additional significant abnormalities were observed in these animals.[3]

References

  1. ^ a b c "Entrez Gene: glucan (1,4-alpha-), branching enzyme 1". Retrieved 2011-08-30.
  2. ^ "Citrobacter infection data for Gbe1". Wellcome Trust Sanger Institute.
  3. ^ a b c d Gerdin AK (2010). "The Sanger Mouse Genetics Programme: High throughput characterisation of knockout mice". Acta Ophthalmologica. 88: 925–7. doi:10.1111/j.1755-3768.2010.4142.x.
  4. ^ Mouse Resources Portal, Wellcome Trust Sanger Institute.
  5. ^ "International Knockout Mouse Consortium".
  6. ^ "Mouse Genome Informatics".
  7. ^ Skarnes WC, Rosen B, West AP, Koutsourakis M, Bushell W, Iyer V, Mujica AO, Thomas M, Harrow J, Cox T, Jackson D, Severin J, Biggs P, Fu J, Nefedov M, de Jong PJ, Stewart AF, Bradley A (Jun 2011). "A conditional knockout resource for the genome-wide study of mouse gene function". Nature. 474 (7351): 337–42. doi:10.1038/nature10163. PMC 3572410. PMID 21677750.
  8. ^ Dolgin E (Jun 2011). "Mouse library set to be knockout". Nature. 474 (7351): 262–3. doi:10.1038/474262a. PMID 21677718.
  9. ^ Collins FS, Rossant J, Wurst W (Jan 2007). "A mouse for all reasons". Cell. 128 (1): 9–13. doi:10.1016/j.cell.2006.12.018. PMID 17218247.
  10. ^ van der Weyden L, White JK, Adams DJ, Logan DW (2011). "The mouse genetics toolkit: revealing function and mechanism". Genome Biology. 12 (6): 224. doi:10.1186/gb-2011-12-6-224. PMC 3218837. PMID 21722353.{{cite journal}}: CS1 maint: unflagged free DOI (link)

Further reading