Descriptions

The Kinesin-1 light chains (KLCs) exhibit autoinhibition through an intramolecular interaction between the TPR domain and a highly conserved peptide motif within an unstructured region, occluding a key cargo binding site. Cargo binding displaces this interaction, leading to a global conformational change in the KLCs, resulting in a more extended conformation which is essential for the regulation of the motor activity.

Autoinhibitory domains (AIDs)

Target domain

206-425 (Cargo binding site on the TPR domain)

Relief mechanism

Partner binding

Assay

Accessory elements

No accessory elements

Autoinhibited structure

Activated structure

1 structures for Q91W40

Entry ID Method Resolution Chain Position Source
AF-Q91W40-F1 Predicted AlphaFoldDB

29 variants for Q91W40

Variant ID(s) Position Change Description Diseaes Association Provenance
rs219061191 11 T>A No EVA
rs260365470 45 A>V No EVA
rs3388880397 59 A>V No EVA
rs3388880372 63 L>M No EVA
rs3388880356 63 L>Q No EVA
rs3388880372 63 L>V No EVA
rs3388880317 64 L>V No EVA
rs3388886877 65 E>G No EVA
rs3388858787 74 S>W No EVA
rs3388881622 115 E>V No EVA
rs3388886501 116 N>I No EVA
rs3388846328 145 S>N No EVA
rs31686294 160 E>K No EVA
rs3388885138 186 K>N No EVA
rs3388858726 213 L>V No EVA
rs3388878358 215 I>V No EVA
rs3388885058 229 L>I No EVA
rs3388880307 265 Y>H No EVA
rs3388885111 309 E>D No EVA
rs3388867771 311 E>D No EVA
rs3388865161 334 K>N No EVA
rs3388881570 389 N>I No EVA
rs3388885567 407 L>M No EVA
rs3388881837 423 Q>H No EVA
rs3388846296 448 V>I No EVA
rs3388858786 458 G>R No EVA
rs3388877130 484 S>F No EVA
rs3388885556 491 L>V No EVA
rs3388858777 492 S>I No EVA

No associated diseases with Q91W40

4 regional properties for Q91W40

Type Name Position InterPro Accession
repeat Tetratricopeptide repeat 249 - 282 IPR019734-1
repeat Tetratricopeptide repeat 291 - 324 IPR019734-2
repeat Tetratricopeptide repeat 333 - 366 IPR019734-3
repeat Tetratricopeptide repeat 375 - 408 IPR019734-4

Functions

Description
EC Number
Subcellular Localization
  • Cytoplasm, cytoskeleton
  • Mitochondrion
  • In elongating spermatid tail midpiece, localized in outer dense fibers (ODFs) and associates with mitochondria (By similarity)
  • Also localizes to the manchette in elongating spermatids (PubMed:28003339)
PANTHER Family
PANTHER Subfamily
PANTHER Protein Class
PANTHER Pathway Category No pathway information available

7 GO annotations of cellular component

Name Definition
ciliary rootlet A cytoskeleton-like structure, originating from the basal body at the proximal end of a cilium, and extending proximally toward the cell nucleus. Rootlets are typically 80-100 nm in diameter and contain cross striae distributed at regular intervals of approximately 55-70 nm.
cytoplasm The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
kinesin complex Any complex that includes a dimer of molecules from the kinesin superfamily, a group of related proteins that contain an extended region of predicted alpha-helical coiled coil in the main chain that likely produces dimerization. The native complexes of several kinesin family members have also been shown to contain additional peptides, often designated light chains as all of the noncatalytic subunits that are currently known are smaller than the chain that contains the motor unit. Kinesin complexes generally possess a force-generating enzymatic activity, or motor, which converts the free energy of the gamma phosphate bond of ATP into mechanical work.
microtubule Any of the long, generally straight, hollow tubes of internal diameter 12-15 nm and external diameter 24 nm found in a wide variety of eukaryotic cells; each consists (usually) of 13 protofilaments of polymeric tubulin, staggered in such a manner that the tubulin monomers are arranged in a helical pattern on the microtubular surface, and with the alpha/beta axes of the tubulin subunits parallel to the long axis of the tubule; exist in equilibrium with pool of tubulin monomers and can be rapidly assembled or disassembled in response to physiological stimuli; concerned with force generation, e.g. in the spindle.
mitochondrion A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.
motile cilium A cilium which may have a variable arrangement of axonemal microtubules and also contains molecular motors. It may beat with a whip-like pattern that promotes cell motility or transport of fluids and other cells across a cell surface, such as on epithelial cells that line the lumenal ducts of various tissues; or they may display a distinct twirling motion that directs fluid flow asymmetrically across the cellular surface to affect asymmetric body plan organization. Motile cilia can be found in single as well as multiple copies per cell.
neuron projection A prolongation or process extending from a nerve cell, e.g. an axon or dendrite.

2 GO annotations of molecular function

Name Definition
kinesin binding Interacting selectively and non-covalently and stoichiometrically with kinesin, a member of a superfamily of microtubule-based motor proteins that perform force-generating tasks such as organelle transport and chromosome segregation.
microtubule binding Binding to a microtubule, a filament composed of tubulin monomers.

6 GO annotations of biological process

Name Definition
axo-dendritic transport The directed movement of organelles or molecules along microtubules in neuron projections.
intraciliary transport The bidirectional movement of large protein complexes along microtubules within a cilium, mediated by motor proteins.
microtubule-based movement A microtubule-based process that results in the movement of organelles, other microtubules, or other cellular components. Examples include motor-driven movement along microtubules and movement driven by polymerization or depolymerization of microtubules.
sperm mitochondrial sheath assembly The assembly and organization of the sperm mitochondrial sheath, the tightly packed helical sheath of ATP-producing mitochondria restricted to the midpiece of the sperm flagellum.
spermatid development The process whose specific outcome is the progression of a spermatid over time, from its formation to the mature structure.
spermatogenesis The developmental process by which male germ line stem cells self renew or give rise to successive cell types resulting in the development of a spermatozoa.

13 homologous proteins in AiPD

UniProt AC Gene Name Protein Name Species Evidence Code
Q2HJJ0 KLC4 Kinesin light chain 4 Bos taurus (Bovine) SS
Q2TBQ9 KLC3 Kinesin light chain 3 Bos taurus (Bovine) SS
P46824 Klc Kinesin light chain Drosophila melanogaster (Fruit fly) SS
Q9NSK0 KLC4 Kinesin light chain 4 Homo sapiens (Human) SS
Q9H0B6 KLC2 Kinesin light chain 2 Homo sapiens (Human) SS
Q07866 KLC1 Kinesin light chain 1 Homo sapiens (Human) SS
Q6P597 KLC3 Kinesin light chain 3 Homo sapiens (Human) SS
Q9DBS5 Klc4 Kinesin light chain 4 Mus musculus (Mouse) SS
O88447 Klc1 Kinesin light chain 1 Mus musculus (Mouse) SS
O88448 Klc2 Kinesin light chain 2 Mus musculus (Mouse) EV
P37285 Klc1 Kinesin light chain 1 Rattus norvegicus (Rat) SS
Q5PQM2 Klc4 Kinesin light chain 4 Rattus norvegicus (Rat) SS
Q68G30 Klc3 Kinesin light chain 3 Rattus norvegicus (Rat) SS
10 20 30 40 50 60
MSVQVAAPGS TGLGPERLNP EELVRQTRQV VQGLEALRAE HHSLAGHLAE ALAGPGPVAG
70 80 90 100 110 120
VELLEEKQQV VNHSLEAIEL GLGEAQVLLA LSAHVSVLEA EKQRLRAQAR RLAQENTWLR
130 140 150 160 170 180
EELEETQRRL RASEEAVAQL EEEKSHLQFL GQLRQYDPPE ESQRPESPPR RDSLASLFPS
190 200 210 220 230 240
EEEEKKGPEA AGAAAAQQGG YEIPARLRTL HNLVIQYAGQ GRYEVAVPLC RQALEDLERS
250 260 270 280 290 300
SGHCHPDVAT MLNILALVYR DQNKYKEATE LLHDALQIRE QTLGPEHPAV AATLNNLAVL
310 320 330 340 350 360
YGKRGRYREA EPLCQRALEI REKVLGADHP DVAKQLNNLA LLCQNQGKFQ DVERHYARAL
370 380 390 400 410 420
SIYEALGGPQ DPNVAKTKNN LASAYLKQNK YQQAEELYKE ILSQEALPAP LGAPQGGTAG
430 440 450 460 470 480
DTQQQVLRRS SSFSKLRESI RRGSEKLVSR LRGEGMAGAA GMKRAMSLNM LNVDGPRAAR
490 500
TQLSQLSTRH LSEAPRTLSI STQDLSPR