The BURP domain is found at the C-terminus of several different plant proteins. It was named after the proteins in which it was first identified: the BNM2 clone-derived protein from Brassica napus Swiss:O65009; USPs and USP-like proteins Swiss:P21746 Swiss:P21747 Swiss:Q06765 Swiss:O24482; RD22 from Arabidopsis thaliana Swiss:Q08298; and PG1beta from Lycopersicon esculentum Swiss:Q40161. This domain is around 230 amino acid residues long. It possesses the following conserved features: two phenylalanine residues at its N-terminus; two cysteine residues; and four repeated cysteine-histidine motifs, arranged as: CH-X(10)-CH-X(25-27)-CH-X(25-26)-CH, where X can be any amino acid [1]. The function of this domain is unknown.

1: A conserved BURP domain defines a novel group of plant proteins with unusual primary structures. Hattori J, Boutilier KA, van Lookeren Campagne MM, Miki BL; Mol Gen Genet 1998;259:424-428. PMID:9790599