Abstract
Tropomodulin family of proteins includes several isoforms of tropomodulins (Tmod) and leiomodins (Lmod), which are differentially expressed in various tissues. They bind to the pointed end of an actin filament and regulate dynamics at that end. By binding to G-actin they sequester actin or nucleate actin polymerization. Of Tmod isoforms, Tmod2 is the best nucleator and Tmod3 is the best in sequestering. Although these properties are isoform-dependent, knowledge on how they vary in their strength of interactions to actin is missing.
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