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Protein Domain : Kelch-like protein 17/20

Primary Identifier  IPR030594 Type  Family
Short Name  KLHL17/KLHL20
description  Kelch-like protein 17 (KLHL17, also known as actinfilin) and Kelch-like protein 20 (KLHL20, also known as KLEIP) belong to the KLHL family []. KLHL17 binds to the actin cytoskeleton and serves as a substrate-specific adapter in the Cul3-dependent ubiquitin ligase complex that targets GluR6 kainate receptor subunit for degradation []. Kainate receptors (KAR) are ionotropic receptors that respond to the neurotransmitter glutamate and have been implicated in epilepsy, stroke, Alzheimer's and neuropathic pain [].KLHL20 assembles with CUL3 and RBX1 to form a multi-subunit Cullin-RING E3 ligase []. The KLHL (Kelch-like) proteins generally have a BTB/POZ domain, a BACK domain, and five to six Kelch motifs. They constitute a subgroup at the intersection between the BTB/POZ domain and Kelch domain superfamilies. The BTB/POZ domain facilitates protein binding [], while the Kelch domain (repeats) form β-propellers. The Kelch superfamily of proteins can be subdivided into five groups: (1) N-propeller, C-dimer proteins, (2) N-propeller proteins, (3) propeller proteins, (4) N-dimer, C-propeller proteins, and (5) C-propeller proteins. KLHL family members belong to the N-dimer, C-propeller subclass of Kelch repeat proteins []. In addition to BTB/POZ and Kelch domains, the KLHL family members contain a BACK domain, first described as a 130-residue region of conservation observed amongst BTB-Kelch proteins []. Many of the Kelch-like proteins have been identified as adaptors for the recruitment of substrates to Cul3-based E3 ubiquitin ligases [, ].

0 Child Features

1 Parent Features

8 Protein Domain Regions