FEATURES

FAMILY

DESCRIPTION

Also known as KTNA1_MOUSE, Katna1. Catalytic subunit of a complex which severs microtubules in an ATP-dependent manner. Microtubule severing may promote rapid reorganization of cellular microtubule arrays and the release of microtubules from the centrosome following nucleation. Microtubule release from the mitotic spindle poles may allow depolymerization of the microtubule end proximal to the spindle pole, leading to poleward microtubule flux and poleward motion of chromosome. The function in regulating microtubule dynamics at spindle poles seems to depend on the association of the katanin KATNA1:KATNB1 complex with ASPM which recruits it to microtubules. Reversely KATNA1:KATNB1 can enhance ASPM blocking activity on microtubule minus-end growth. Microtubule release within the cell body of neurons may be required for their transport into neuronal processes by microtubule-dependent motor proteins. This transport is required for axonal growth. Can homooligomerize into hexameric rings, which may be promoted by interaction with microtubules. Interacts with KATNB1, which may serve as a targeting subunit (By similarity). Interacts with ASPM; the katanin complex formation KATNA1:KATNB1 is required for the association of ASPM (PubMed:28436967). Interacts with dynein and NDEL1. Associates with the E3 ligase complex containing DYRK2, EDD/UBR5, DDB1 and DCAF1 proteins (EDVP complex). Interacts with KLHL42 (via the kelch domains). Interacts with CUL3; the interaction is enhanced by KLHL42 (By similarity). Interacts with KATNB1 and KATNBL1 (By similarity). Interacts with CAMSAP2 and CAMSAP3; leading to regulate the length of CAMSAP-decorated microtubule stretches (By similarity).

EXTERNAL LINKS

Katna1

Katanin p60 ATPase-containing subunit A1

Katna1

Molecular Synopsis