FEATURES

FAMILY

DESCRIPTION

Also known as KTNB1_MOUSE, Katnb1. Participates in a complex which severs microtubules in an ATP-dependent manner. May act to target the enzymatic subunit of this complex to sites of action such as the centrosome. 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. Interacts with KATNA1. This interaction enhances the microtubule binding and severing activity of KATNA1 and also targets this activity to the centrosome (PubMed:16203747). This interaction is weakly competed by KATNBL1 which has a lower affinity for it (By similarity). Interacts with ASPM; the katanin complex formation KATNA1:KATNB1 is required for the association of ASPM (PubMed:28436967). Interacts with dynein, microtubules, NDEL1 and PAFAH1B1 (PubMed:16203747). Interacts with KATNAL1; this interaction is weakly competed by KATNBL1 which has a lower affinity for it (By similarity). Interacts with CAMSAP2 and CAMSAP3; leading to regulate the length of CAMSAP-decorated microtubule stretches (By similarity).

EXTERNAL LINKS

Katnb1

Katanin p80 WD40 repeat-containing subunit B1

Katnb1

Molecular Synopsis