MYLK4

Myosin light chain kinase family, member 4

The crystal structure of the human myosin light chain kinase Loc340156.^[1]

Identifiers

Symbol

MYLK4

NCBI gene

340156

HGNC

27972

RefSeq

NM_001012418

UniProt

Q86YV6

Other data

EC number

2.7.11.18

Locus

Chr. 6 p25.2

Search for
Structures	Swiss-model
Domains	InterPro

Myosin light chain kinase 4 also known as MYLK4 is an enzyme which in humans is encoded by the MYLK2 gene.^[2] MYLK4 is a member of the myosin light-chain kinase family of serine/threonine-specific protein kinases that phosphorylate the regulatory light chain of myosin II.^[3]

This protein acts as an enzyme that catalyzes the following reaction: ATP + a protein -> ADP + a phosphoprotein.^[4]

MYLK4 is also involved in protein amino acid phosphorylation meaning that it adds a phosphate group onto the molecule.^[5]

Not very much is known about the specific functional characteristics of MLYK4, but it has recently been found that the gene may possibly have a role in having at least one driver mutation for cancer.^[6] MYLK4 may also be involved in transferase activity, ATP binding, protein serine/threonine kinase activity, and also nucleotide binding.^[7] Other names for MYLK4 are CaMLCK like; EG238564; MYLK4; Mylk4; Myosin light chain kinase family, member 4; SgK085; SGK085; Sgk085; Sugen kinase 85; Uncharacterized serine/threonine-protein kinase SgK085.^[8]

There are other known myosin light-chain kinase enzymes.

References

^ "RCSB Protein Data Bank - Structure Summary for 2X4F - The Crystal Structure of the Human Myosin Light Chain Kinase Loc340156".
^ Manning G, Whyte DB, Martinez R, Hunter T, Sudarsanam S (December 2002). "The protein kinase complement of the human genome". Science. 298 (5600): 1912–34. Bibcode:2002Sci...298.1912M. doi:10.1126/science.1075762. PMID 12471243. S2CID 26554314.
^ Gao Y, Ye LH, Kishi H, Okagaki T, Samizo K, Nakamura A, Kohama K (June 2001). "Myosin light chain kinase as a multifunctional regulatory protein of smooth muscle contraction". IUBMB Life. 51 (6): 337–44. doi:10.1080/152165401753366087. PMID 11758800. S2CID 46180993.
^ "MYLK4 - Protein (Function), MYLK4 - Protein (Function)".^{[permanent dead link]}
^ "www.phosphosite.org".
^ "SGC | Human Myosin Light Chain Kinase Family Member 4 (LOC340156) PDB Code: 2X4F".
^ "MYLK4 Gene - GeneCards | MYLK4 Protein | MYLK4 Antibody".
^ "Sgk085 : Protein Overview : UCSD Molecule Pages". Archived from the original on 2011-07-22. Retrieved 2011-04-26.

Kinases: Serine/threonine-specific protein kinases (EC 2.7.11-12)

Serine/threonine-specific protein kinases (EC 2.7.11.1-EC 2.7.11.20)

Non-specific serine/threonine protein kinases (EC 2.7.11.1)	LATS1 LATS2 MAST1 MAST2 STK38 STK38L CIT ROCK1 SGK SGK2 SGK3 Protein kinase B AKT1 AKT2 AKT3 Ataxia telangiectasia mutated mTOR EIF-2 kinases PKR HRI EIF2AK3 EIF2AK4 Wee1 WEE1
Pyruvate dehydrogenase kinase (EC 2.7.11.2)	PDK1 PDK2 PDK3 PDK4
Dephospho-(reductase kinase) kinase (EC 2.7.11.3)	AMP-activated protein kinase α PRKAA1 PRKAA2 β PRKAB1 PRKAB2 γ PRKAG1 PRKAG2 PRKAG3
3-methyl-2-oxobutanoate dehydrogenase (acetyl-transferring) kinase (EC 2.7.11.4)	BCKDK BCKDHA BCKDHB
(isocitrate dehydrogenase (NADP+)) kinase (EC 2.7.11.5)	IDH2 IDH3A IDH3B IDH3G
(tyrosine 3-monooxygenase) kinase (EC 2.7.11.6)	STK4
Myosin-heavy-chain kinase (EC 2.7.11.7)	Aurora kinase Aurora A kinase Aurora B kinase Aurora C kinase
Fas-activated serine/threonine kinase (EC 2.7.11.8)	FASTK STK10
Goodpasture-antigen-binding protein kinase (EC 2.7.11.9)	-
IκB kinase (EC 2.7.11.10)	CHUK IKK2 TBK1 IKBKE IKBKG IKBKAP
cAMP-dependent protein kinase (EC 2.7.11.11)	Protein kinase A PRKACG PRKACB PRKACA PRKY
cGMP-dependent protein kinase (EC 2.7.11.12)	Protein kinase G PRKG1
Protein kinase C (EC 2.7.11.13)	Protein kinase C Protein kinase Cζ PKC alpha PRKCB1 PRKCD PRKCE PRKCH PRKCG PRKCI PRKCQ Protein kinase N1 PKN2 PKN3
Rhodopsin kinase (EC 2.7.11.14)	Rhodopsin kinase
Beta adrenergic receptor kinase (EC 2.7.11.15)	Beta adrenergic receptor kinase Beta adrenergic receptor kinase-2
G-protein coupled receptor kinases (EC 2.7.11.16)	GRK4 GRK5 GRK6
Ca2+/calmodulin-dependent (EC 2.7.11.17)	BRSK2 CAMK1 CAMK1A CAMK1B CAMK1D CAMK1G CAMK2 CAMK2A CAMK2B CAMK2D CAMK2G CAMK4 MLCK CASK CHEK1 CHEK2 DAPK1 DAPK2 DAPK3 STK11 MAPKAPK2 MAPKAPK3 MAPKAPK5 MARK1 MARK2 MARK3 MARK4 MELK MKNK1 MKNK2 NUAK1 NUAK2 OBSCN PASK PHKG1 PHKG2 PIM1 PIM2 PKD1 PRKD2 PRKD3 PSKH1 SNF1LK2 KIAA0999 STK40 SNF1LK SNRK SPEG TSSK2 Kalirin TRIB1 TRIB2 TRIB3 TRIO Titin DCLK1
Myosin light-chain kinase (EC 2.7.11.18)	MYLK MYLK2 MYLK3 MYLK4
Phosphorylase kinase (EC 2.7.11.19)	PHKA1 PHKA2 PHKB PHKG1 PHKG2
Elongation factor 2 kinase (EC 2.7.11.20)	EEF2K STK19
Polo kinase (EC 2.7.11.21)	PLK1 PLK2 PLK3 PLK4

Serine/threonine-specific protein kinases (EC 2.7.11.21-EC 2.7.11.30)

Polo kinase (EC 2.7.11.21)	PLK1 PLK2 PLK3 PLK4
Cyclin-dependent kinase (EC 2.7.11.22)	CDK1 CDK2 CDKL2 CDK3 CDK4 CDK5 CDKL5 CDK6 CDK7 CDK8 CDK9 CDK10 CDK12 CDC2L5 PCTK1 PCTK2 PCTK3 PFTK1 CDC2L1
(RNA-polymerase)-subunit kinase (EC 2.7.11.23)	RPS6KA5 RPS6KA4 P70S6 kinase P70-S6 Kinase 1 RPS6KB2 RPS6KA2 RPS6KA3 RPS6KA1 RPS6KC1
Mitogen-activated protein kinase (EC 2.7.11.24)	Extracellular signal-regulated MAPK1 MAPK3 MAPK4 MAPK6 MAPK7 MAPK12 MAPK15 C-Jun N-terminal MAPK8 MAPK9 MAPK10 P38 mitogen-activated protein MAPK11 MAPK13 MAPK14
MAP3K (EC 2.7.11.25)	MAP kinase kinase kinases MAP3K1 MAP3K2 MAP3K3 MAP3K4 MAP3K5 MAP3K6 MAP3K7 MAP3K8 RAFs ARAF BRAF KSR1 KSR2 MLKs MAP3K12 MAP3K13 MAP3K9 MAP3K10 MAP3K11 MAP3K7 ZAK CDC7 MAP3K14
Tau-protein kinase (EC 2.7.11.26)	TPK1 TTK GSK-3
(acetyl-CoA carboxylase) kinase (EC 2.7.11.27)	-
Tropomyosin kinase (EC 2.7.11.28)	-
Low-density-lipoprotein receptor kinase (EC 2.7.11.29)	-
Receptor protein serine/threonine kinase (EC 2.7.11.30)	Bone morphogenetic protein receptors BMPR1 BMPR1A BMPR1B BMPR2 ACVR1 ACVR1B ACVR1C ACVR2A ACVR2B ACVRL1 Anti-Müllerian hormone receptor

Dual-specificity kinases (EC 2.7.12)

MAP2K	MAP2K1 MAP2K2 MAP2K3 MAP2K4 MAP2K5 MAP2K6 MAP2K7

v t e Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)