Table 2Summary of cytoplasmic dynein 1 and dynactin subunit composition. Data for this table is summarized in refs. 4,8,166

Motor ProteinSubunitNew Nomenclature167No.Comments
CytoplasmicHeavy chain2Power generating unit
Dynein 1DHC1aDYNC1H1
Intermediate chains IC-1A, B splicing isoforms IC-2A, B, C splicing isoformsDYNC1I1 DYNC1I22IC proteins are the major scaffolding molecule of dynein complex. Multiple
splicing isoforms exist. Bind DHC, light chains and dynactin subunit p150.
Light intermediate chains2-4Several splicing
LIC1DYNC1LI1isoforms of LIC2 exist.
OR LIC2DYNC1LI2Both LICs bind DHC and can bind cargo.
Each complex contains either LIC1 or LIC2, but not both.
Light chains Tctex 1 light chain 1 OR Tctex 1 light chain 3 (rp3) DYNLT1 DYNLT3 4-5Some may be involved in cargo binding.
Roadblock 1 (Rdbl1)DYNLRB1
OR Roadblock 2 (Rdbl2)DYNLRB2
LC8 light chain 1DYNLL1
ORLC8 light chain 2DYNLL2
Dynactinp150Glued2Dimerisation mediated through coiled coils. The subunit binds dynein intermediate chain, p50, p25, p24 and Arp1 filament.
p621Binds the -end of Arp1 filament, p25, p27, Arp1 and Arp11. Not necessary for dynactin stability.
Dynamitin (p50)4The subunits associate with each other p24 and p150.
Arp111Binds -end of Arp1 filament.
Arp18Can form short filaments and connects the dynactin complex with cargo.
β-actin?Copurifies with dynactin complex.
CapZ α/β1Binds +end of Arp1 filament.
p24/p222Binds p150 and p50.
p271?Loosely associated with dynactin complex. Also exists soluble in cytoplasm.
p251?

From: Carrier Motility

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Madame Curie Bioscience Database [Internet].
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