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Myozenin: An alpha-actinin- and gamma-filamin-binding protein of skeletal muscle Z lines
Myozenin: An alpha-actinin- and gamma-filamin-binding protein of skeletal muscle Z lines PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA Takada, F., Vander Woude, D. L., Tong, H. Q., Thompson, T. G., Watkins, S. C., Kunkel, L. M., Beggs, A. H. 2001; 98 (4): 1595–1600Abstract
To better understand the structure and function of Z lines, we used sarcomeric isoforms of alpha-actinin and gamma-filamin to screen a human skeletal muscle cDNA library for interacting proteins by using the yeast two-hybrid system. Here we describe myozenin (MYOZ), an alpha-actinin- and gamma-filamin-binding Z line protein expressed predominantly in skeletal muscle. Myozenin is predicted to be a 32-kDa, globular protein with a central glycine-rich domain flanked by alpha-helical regions with no strong homologies to any known genes. The MYOZ gene has six exons and maps to human chromosome 10q22.1-q22.2. Northern blot analysis demonstrated that this transcript is expressed primarily in skeletal muscle with significantly lower levels of expression in several other tissues. Antimyozenin antisera stain skeletal muscle in a sarcomeric pattern indistinguishable from that seen by using antibodies for alpha-actinin, and immunogold electron microscopy confirms localization specifically to Z lines. Thus, myozenin is a skeletal muscle Z line protein that may be a good candidate gene for limb-girdle muscular dystrophy or other neuromuscular disorders.
View details for DOI 10.1073/pnas.041609698
View details for Web of Science ID 000166949200053
View details for PubMedID 11171996
View details for PubMedCentralID PMC29302