Proteins containing GRAM domains are found in all eukaryotes and bacteria, but not archaea.[3] Various GRAM domains can bind proteins or lipids.[3]
^Doerks T, Strauss M, Brendel M, Bork P (October 2000). "GRAM, a novel domain in glucosyltransferases, myotubularins and other putative membrane-associated proteins". Trends Biochem. Sci. 25 (10): 483–5. doi:10.1016/S0968-0004(00)01664-9. PMID11050430.