This entry represents the DM10 domain, which consists of approximately 105 residues whose function is unknown. It has been identified in nucleoside diphosphate kinases, namely Nucleoside diphosphate kinase 7 (NDK7), which contain a single copy of the DM10 domain [1,2], and in uncharacterised proteins including Rib72 from Chlamydomonas and EF-hand domain-containing protein 1/EF-hand domain-containing family member C2 (EFHC1/2) from mammals, which contain multiple copies of DM10 domains. In Chlamydomonas, and possibly mammals, DM10 domain-containing proteins are tightly bound to the flagellar doublet microtubules. This suggests that DM10 domains might act as flagellar NDK regulatory modules or as units specifically involved in axonemal targeting or assembly [3,4]. This domain have a PH-like fold which includes seven beta strands, with a short 3-4 residue helix after the first strand, and a more extended alpha helical region at the C terminus [2,3].

1: Nme protein family evolutionary history, a vertebrate perspective. Desvignes T, Pontarotti P, Fauvel C, Bobe J; BMC Evol Biol. 2009;9:256. PMID:19852809

2: Functional characterization of putative cilia genes by high-content analysis. Lai CK, Gupta N, Wen X, Rangell L, Chih B, Peterson AS, Bazan JF, Li L, Scales SJ; Mol Biol Cell. 2011;22:1104-1119. PMID:21289087

3: Axonemal protofilament ribbons, DM10 domains, and the link to juvenile myoclonic epilepsy. King SM; Cell Motil Cytoskeleton. 2006;63:245-253. PMID:16572395

4: EF-hand domain containing 2 (Efhc2) is crucial for distal segmentation of pronephros in zebrafish. Barrodia P, Patra C, Swain RK; Cell Biosci. 2018;8:53. PMID:30349665