e1460 : good movement slightly small thin and transparent; abnormal reduced birefringence in body wall and pharyngeal muscle; thick filaments disarranged no M-line. ES1 ME3. NA > 10 (st85amber r291 etc.).
[Leon Avery] Pharyngeal contractions are feeble. Worms are small and starved.
See also ad539, e1460, e2338
[C.elegansII] e1460 : good movement, slightly small, thin and transparent; abnormal reduced birefringence in body wall and pharyngeal muscle; thick filaments disarranged, no M-line. ES1 ME3. OA>10: st85amb, r291,ad539 (pka phm-1, worms small and starved, feeble pharyngeal contractions), e2338amb,st515::Tc1 etc. Cloned: encodes 750 kD protein related to UNC-22 (twitchin). Antibodies stain middle of A bands. [Waterston et al. 1980; GB]
unc-89 encodes several protein isoforms variably characterized by the presence or absence of SH3, DH, PH, immunoglobulin and myosin light chain kinase (MLCK)-like protein kinase domains; during development, unc-89 is required for proper organization of A bands in striated muscle and thus for fully normal locomotion, pharyngeal muscle contractions, and body size; unc-89 is expressed in body wall muscle, pharyngeal muscle and some cells in the tail; UNC-89 protein isoforms localize to the middle of A-bands, consistent with UNC-89 being an M line component; UNC-89 interacts with the SCPL-1 phosphatase both in vitro and in vivo.
Enables MATH domain binding activity; enzyme binding activity; and guanyl-nucleotide exchange factor activity. Involved in several processes, including myofibril assembly; pharyngeal gland morphogenesis; and regulation of striated muscle contraction. Located in M band. Expressed in alimentary muscle; gonad; tail; and vulval muscle. Human ortholog(s) of this gene implicated in centronuclear myopathy 5. Is an ortholog of human SPEG (striated muscle enriched protein kinase).