FEATURES

FAMILY

DESCRIPTION

Also known as TBB3_HUMAN, TUBB3, TUBB4. Tubulin is the major constituent of microtubules. It binds two moles of GTP, one at an exchangeable site on the beta chain and one at a non-exchangeable site on the alpha chain. TUBB3 plays a critical role in proper axon guidance and maintenance. Binding of NTN1/Netrin-1 to its receptor UNC5C might cause dissociation of UNC5C from polymerized TUBB3 in microtubules and thereby lead to increased microtubule dynamics and axon repulsion (PubMed:28483977). Plays a role in dorsal root ganglion axon projection towards the spinal cord (PubMed:28483977). Dimer of alpha and beta chains. A typical microtubule is a hollow water-filled tube with an outer diameter of 25 nm and an inner diameter of 15 nM. Alpha-beta heterodimers associate head-to-tail to form protofilaments running lengthwise along the microtubule wall with the beta-tubulin subunit facing the microtubule plus end conferring a structural polarity. Microtubules usually have 13 protofilaments but different protofilament numbers can be found in some organisms and specialized cells. Interacts with UNC5C (via cytoplasmic domain); this interaction is decreased by NTN1/Netrin-1 (PubMed:28483977). Interacts with NLRP5/MATER at cytoskeleton microtubules (PubMed:24374158).

EXTERNAL LINKS

TUBB3

Tubulin beta-3 chain

TUBB3

Molecular Synopsis