Nucleotide Binding Protein 2 (NUBP2)

NUBP2 is a member of the NUBP/MRP gene subfamily of ATP-binding proteins. Nakashima et al. (1999) cloned mouse Nubp2 and used the murine sequence as a probe in EST database analysis, followed by screening a human teratoma cDNA library to clone full-length human NUBP2. The 271-amino acid human NUBP2 protein shares 72.6% amino acid similarity with mouse Nubp2. Northern blot analysis detected a 1.4-kb NUBP2 transcript with ubiquitous expression in all human adult and fetal tissues tested, with highest expression in adult skeletal muscle. NUBP2 contains conserved an ATP/GTP binding motif A (P-loop), an ATP/GTP binding motif A-prime, and NUBP/MRP alpha and beta motifs. NUBP2 lacks an additional N-terminal sequence with 4 cysteine residues that is present in NUBP1.