Actin and actin-binding proteins. A critical evaluation of mechanisms and functions.

PERSPECTIVES AND SUMMARY . . . . . . . . . .. . . . .. . . . ... . ......... ...... . . . .. . . . . . 988 INTRODUCTION . ......... . . . . . ...... . .. . . . . ... . .. . . . . . . . .. . . .... 988 THE ACTIN MOLECULE ........ . . .... . . . .. . . .. .. .. . . .. . . ......... . .. . .. ...... . . . .. . . . ... . ... . . . . . 989 MECHANISM OF POL YMERIZA TION ..... , ,. 994 MECHANICAL PROPERTIES , . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . 1004 ACTIN MONOMER BINDING PROTEINS ... ...... . . ... . . .... . . . . . . . 1006 CAPPING PROTEINS ........ .... , 1011 LOW-MOLECULAR-WEIGHT SEVERING PROTEINS .... . .. . . . .... 1018 PROTEINS THAT BIND TO THE SIDES OF ACTIN FILAMENTS ...... . . . .. ......... . . 1019 MEMBRANE ATTACHMENT PROTEINS ... . . .... . . . .. . ..... .... . . .. . . ... 1026 FUTURE RESEARCH .. . . . . . ..... . . .... . . .. . . . .. . . . ... . . ... . .... . .... 1029