A nebulin super-repeat panel reveals stronger actin binding toward the ends of the super-repeat region.

Abstract:

INTRODUCTION:Nebulin is a giant actin-binding protein in the thin filament of the skeletal muscle sarcomere. Studies of nebulin interactions are limited by the size, complexity, and poor solubility of the protein. We divided the nebulin super-repeat region into a super-repeat panel, and studied nebulin/actin interactions. METHODS:Actin binding was studied using a co-sedimentation assay with filamentous actin and 26 different nebulin super-repeats. RESULTS:The panel revealed notable differences in actin binding between the super-repeats. Both ends of the super-repeat region bound actin significantly more strongly, whereas the central part of the protein bound actin weakly. Thus, the binding between nebulin and actin formed a location-dependent pattern of strong vs. weak binding. DISCUSSION:The nebulin super-repeat panel allowed us to study the actin binding of each super-repeat individually. The panel will be a powerful tool in elucidating nebulin function in health and disease. Muscle Nerve 59:116-121, 2019.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Laitila J,Lehtonen J,Lehtokari VL,Sagath L,Wallgren-Pettersson C,Grönholm M,Pelin K

doi

10.1002/mus.26350

subject

Has Abstract

pub_date

2019-01-01 00:00:00

pages

116-121

issue

1

eissn

0148-639X

issn

1097-4598

journal_volume

59

pub_type

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