This family includes proteins that are about 100 amino acids long and have been shown to be related [3]. Members of this family of proteins are associated with both flagellar outer arm dynein and Drosophila and rat brain cytoplasmic dynein. It is proposed that roadblock/LC7 family members may modulate specific dynein functions [2]. This family also includes Swiss:Q9Y2Q5 Golgi-associated MP1 adapter protein and MglB from Myxococcus xanthus Swiss:Q50883, a protein involved in gliding motility [4]. However the family also includes members from non-motile bacteria such as Streptomyces coelicolor, suggesting that the protein may play a structural or regulatory role.

1: Site-specific recognition of a 70-base-pair element containing d(GA)(n) repeats mediates bithoraxoid polycomb group response element-dependent silencing. Hodgson JW, Argiropoulos B, Brock HW; Mol Cell Biol 2001;21:4528-4543. PMID:11416132

2: Drosophila roadblock and Chlamydomonas LC7: a conserved family of dynein-associated proteins involved in axonal transport, flagellar motility, and mitosis. Bowman AB, Patel-King RS, Benashski SE, McCaffery JM, Goldstein LS, King SM; J Cell Biol 1999;146:165-180. PMID:10402468

3: Dynein light chains of the Roadblock/LC7 group belong to an ancient protein superfamily implicated in NTPase regulation. Koonin EV, Aravind L; Curr Biol 2000;10:774-776. PMID:11084347

4: Gliding motility in Myxococcus xanthus: mgl locus, RNA, and predicted protein products. Stephens K, Hartzell P, Kaiser D; J Bacteriol 1989;171:819-830. PMID:2464581