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A homotetrameric complex, beta-glucuronidase (a glycosidase). Each subunit has the same amino acid sequence.

A homotetramer is a protein complex made up of four identical subunits which are associated but not covalently bound.[1] A heterotetramer is a 4-subunit complex where one or more subunits differ.[2]

Examples of homotetramers include:

See also[edit]


  1. ^ "GO term: protein homotetramerization". YeastGenome. Retrieved 14 May 2011. 
  2. ^ "GO term: protein heterotetramerization". YeastGenome. Retrieved 14 May 2011. 
  3. ^ Watanabe, M; Blobel, G (April 1989). "Cytosolic factor purified from Escherichia coli is necessary and sufficient for the export of a preprotein and is a homotetramer of SecB.". Proceedings of the National Academy of Sciences of the United States of America. 86 (8): 2728–32. doi:10.1073/pnas.86.8.2728. PMC 286991Freely accessible. PMID 2649892. 
  4. ^ Warren, M. A.; Kucharski, L. M.; Veenstra, A.; Shi, L.; Grulich, P. F.; Maguire, M. E. (1 July 2004). "The CorA Mg2+ Transporter Is a Homotetramer". Journal of Bacteriology. 186 (14): 4605–4612. doi:10.1128/JB.186.14.4605-4612.2004. PMC 438605Freely accessible. PMID 15231793.