Page last updated: 2024-08-07 16:44:32

Casein kinase I isoform alpha

A casein kinase I isoform alpha that is encoded in the genome of human. [PRO:DNx, UniProtKB:P48729]

Synonyms

CKI-alpha;
EC 2.7.11.1;
CK1

Research

Bioassay Publications (30)

TimeframeStudies on this Protein(%)All Drugs %
pre-19901 (3.33)18.7374
1990's2 (6.67)18.2507
2000's10 (33.33)29.6817
2010's13 (43.33)24.3611
2020's4 (13.33)2.80

Compounds (252)

Drugs with Inhibition Measurements

DrugTaxonomyMeasurementAverage (mM)Bioassay(s)Publication(s)
N-(2-aminoethyl)-5-chloro-1-naphthalenesulfonamideHomo sapiens (human)Ki80.000011
cgs 15943Homo sapiens (human)IC500.820011
n-(2-aminoethyl)-5-isoquinolinesulfonamideHomo sapiens (human)IC5097.920015
ic 261Homo sapiens (human)IC501.120022
sb 239063Homo sapiens (human)Ki0.501011
triamtereneHomo sapiens (human)IC5036.800011
1,4-dihydroxyanthraquinoneHomo sapiens (human)IC5040.000011
1-amino-4-hydroxyanthraquinoneHomo sapiens (human)IC504.000011
1,4-diaminoanthraquinoneHomo sapiens (human)IC504.000011
staurosporineHomo sapiens (human)IC503.412044
gefitinibHomo sapiens (human)IC5050.000011
cki 7Homo sapiens (human)IC50301.750038
birb 796Homo sapiens (human)IC5030.000011
cyc 202Homo sapiens (human)IC5023.333333
sorafenibHomo sapiens (human)IC500.250011
7-n-butyl-6-(4'-hydroxyphenyl)-5h-pyrrolo(2,3b)pyrazineHomo sapiens (human)IC50100.000011
h 89Homo sapiens (human)Ki46.2025311
dasatinibHomo sapiens (human)IC500.001011
su 11248Homo sapiens (human)IC500.001011
jnj-7706621Homo sapiens (human)IC5011.200011
d 4476Homo sapiens (human)IC500.300022
4-[4-(4-fluorophenyl)-2-(4-methylsulfonylphenyl)-1H-imidazol-5-yl]pyridineHomo sapiens (human)Ki0.650011
jnj 10198409Homo sapiens (human)IC507.200011
leucettamine bHomo sapiens (human)IC50100.000011
cx 4945Homo sapiens (human)IC500.004011
bi d1870Homo sapiens (human)IC500.5525211
bs 194Homo sapiens (human)IC501.040011
(R)-DRF053Homo sapiens (human)IC500.014011
longdaysinHomo sapiens (human)IC5012.000011

Drugs with Activation Measurements

DrugTaxonomyMeasurementAverage (mM)Bioassay(s)Publication(s)
fasudilHomo sapiens (human)Kd30.000011
4-(4'-hydroxyphenyl)-amino-6,7-dimethoxyquinazolineHomo sapiens (human)Kd30.000011
imatinibHomo sapiens (human)Kd20.000022
triciribine phosphateHomo sapiens (human)Kd30.000011
staurosporineHomo sapiens (human)Kd0.970011
picropodophyllinHomo sapiens (human)Kd30.000012
gefitinibHomo sapiens (human)Kd20.000022
lestaurtinibHomo sapiens (human)Kd16.666733
perifosineHomo sapiens (human)Kd30.000011
vatalanibHomo sapiens (human)Kd20.000022
ruboxistaurinHomo sapiens (human)Kd20.000022
canertinibHomo sapiens (human)Kd20.000022
birb 796Homo sapiens (human)Kd10.000011
cyc 202Homo sapiens (human)Kd30.000011
sb 203580Homo sapiens (human)Kd0.075011
enzastaurinHomo sapiens (human)Kd20.000022
erlotinibHomo sapiens (human)Kd20.000022
lapatinibHomo sapiens (human)Kd20.000022
sorafenibHomo sapiens (human)Kd16.666733
pd 173955Homo sapiens (human)Kd10.000011
s 1033Homo sapiens (human)Kd20.000022
xl147Homo sapiens (human)Kd30.000011
bms 387032Homo sapiens (human)Kd15.500022
sf 2370Homo sapiens (human)Kd30.000011
tandutinibHomo sapiens (human)Kd16.666733
vx-745Homo sapiens (human)Kd10.000011
dasatinibHomo sapiens (human)Kd20.000022
ha 1100Homo sapiens (human)Kd30.000011
7-epi-hydroxystaurosporineHomo sapiens (human)Kd30.000011
zd 6474Homo sapiens (human)Kd20.000022
imd 0354Homo sapiens (human)Kd30.000011
pyrviniumHomo sapiens (human)Kd0.001011
sirolimusHomo sapiens (human)Kd30.000011
alvocidibHomo sapiens (human)Kd16.550022
bosutinibHomo sapiens (human)Kd15.140022
orantinibHomo sapiens (human)Kd30.000011
su 11248Homo sapiens (human)Kd2.662733
palbociclibHomo sapiens (human)Kd30.000011
vx680Homo sapiens (human)Kd20.000022
cyc 116Homo sapiens (human)Kd0.958011
everolimusHomo sapiens (human)Kd30.000011
ekb 569Homo sapiens (human)Kd30.000011
axitinibHomo sapiens (human)Kd20.000022
temsirolimusHomo sapiens (human)Kd30.000011
pd 184352Homo sapiens (human)Kd10.000011
on 01910Homo sapiens (human)Kd30.000012
av 412Homo sapiens (human)Kd30.000011
telatinibHomo sapiens (human)Kd30.000011
y-39983Homo sapiens (human)Kd0.766011
cp 547632Homo sapiens (human)Kd30.000011
bms345541Homo sapiens (human)Kd10.000011
lenvatinibHomo sapiens (human)Kd30.000011
pd 0325901Homo sapiens (human)Kd30.000011
midostaurinHomo sapiens (human)Kd16.666733
px-866Homo sapiens (human)Kd30.000011
ripasudilHomo sapiens (human)Kd30.000011
osi 930Homo sapiens (human)Kd30.000011
ki 20227Homo sapiens (human)Kd10.000011
scio-469Homo sapiens (human)Kd30.000011
cp 724714Homo sapiens (human)Kd30.000011
pi103Homo sapiens (human)Kd10.000011
hmn-214Homo sapiens (human)Kd30.000011
tivozanibHomo sapiens (human)Kd30.000011
hki 272Homo sapiens (human)Kd20.000022
tofacitinibHomo sapiens (human)Kd20.000022
n-(6-chloro-7-methoxy-9h-beta-carbolin-8-yl)-2-methylnicotinamideHomo sapiens (human)Kd10.000011
cediranibHomo sapiens (human)Kd20.000022
masitinibHomo sapiens (human)Kd20.000022
ly-2157299Homo sapiens (human)Kd19.352011
pazopanibHomo sapiens (human)Kd23.333323
azd 6244Homo sapiens (human)Kd20.000022
su 14813Homo sapiens (human)Kd15.200022
bibw 2992Homo sapiens (human)Kd20.000022
binimetinibHomo sapiens (human)Kd30.000011
sotrastaurinHomo sapiens (human)Kd30.000011
aee 788Homo sapiens (human)Kd30.000011
saracatinibHomo sapiens (human)Kd30.000011
vx 702Homo sapiens (human)Kd30.000011
crenolanibHomo sapiens (human)Kd30.000011
tg100-115Homo sapiens (human)Kd15.415022
cc 401Homo sapiens (human)Kd5.161011
bms 599626Homo sapiens (human)Kd30.000011
exel-7647Homo sapiens (human)Kd30.000011
volasertibHomo sapiens (human)Kd30.000011
pha 665752Homo sapiens (human)Kd10.000011
azd 7762Homo sapiens (human)Kd30.000011
regorafenibHomo sapiens (human)Kd30.000011
6-[[5-fluoro-2-(3,4,5-trimethoxyanilino)-4-pyrimidinyl]amino]-2,2-dimethyl-4H-pyrido[3,2-b][1,4]oxazin-3-oneHomo sapiens (human)Kd20.000022
brivanibHomo sapiens (human)Kd20.000022
mp470Homo sapiens (human)Kd30.000011
rgb 286638Homo sapiens (human)Kd8.073011
np 031112Homo sapiens (human)Kd30.000011
at 7519Homo sapiens (human)Kd20.000022
bms-690514Homo sapiens (human)Kd1.371011
bi 2536Homo sapiens (human)Kd16.550022
inno-406Homo sapiens (human)Kd30.000011
nvp-ast487Homo sapiens (human)Kd10.000011
kw 2449Homo sapiens (human)Kd15.600022
danusertibHomo sapiens (human)Kd30.000011
abt 869Homo sapiens (human)Kd20.000022
azd 8931Homo sapiens (human)Kd30.000011
arq 197Homo sapiens (human)Kd30.000011
azd 1152Homo sapiens (human)Kd30.000011
pf 00299804Homo sapiens (human)Kd30.000011
ridaforolimusHomo sapiens (human)Kd30.000011
ch 4987655Homo sapiens (human)Kd30.000011
6-(5-((cyclopropylamino)carbonyl)-3-fluoro-2-methylphenyl)-n-(2,2-dimethylprpyl)-3-pyridinecarboxamideHomo sapiens (human)Kd30.000011
cc-930Homo sapiens (human)Kd30.000011
gw 2580Homo sapiens (human)Kd10.000011
tak 285Homo sapiens (human)Kd30.000011
idelalisibHomo sapiens (human)Kd30.000011
crizotinibHomo sapiens (human)Kd10.000011
osi 906Homo sapiens (human)Kd30.000011
chir-265Homo sapiens (human)Kd20.000022
motesanibHomo sapiens (human)Kd23.333323
fostamatinibHomo sapiens (human)Kd30.000011
trametinibHomo sapiens (human)Kd30.000011
mln8054Homo sapiens (human)Kd20.000022
pf-562,271Homo sapiens (human)Kd30.000011
GDC-0879Homo sapiens (human)Kd10.000011
jnj-26483327Homo sapiens (human)Kd30.000011
ly2603618Homo sapiens (human)Kd30.000011
tg100801Homo sapiens (human)Kd30.000011
dactolisibHomo sapiens (human)Kd30.000011
bgt226Homo sapiens (human)Kd30.000011
gsk 461364Homo sapiens (human)Kd20.000022
azd 1152-hqpaHomo sapiens (human)Kd20.000022
nvp-tae684Homo sapiens (human)Kd10.000011
enmd 2076Homo sapiens (human)Kd30.000011
e 7050Homo sapiens (human)Kd30.000011
2-amino-8-ethyl-4-methyl-6-(1H-pyrazol-5-yl)-7-pyrido[2,3-d]pyrimidinoneHomo sapiens (human)Kd30.000011
tak-901Homo sapiens (human)Kd30.000011
gdc-0973Homo sapiens (human)Kd30.000011
buparlisibHomo sapiens (human)Kd30.000011
azd 1480Homo sapiens (human)Kd30.000012
azd8330Homo sapiens (human)Kd30.000011
pha 848125Homo sapiens (human)Kd0.995011
ro5126766Homo sapiens (human)Kd30.000011
fedratinibHomo sapiens (human)Kd20.000022
gsk690693Homo sapiens (human)Kd20.000022
14-methyl-20-oxa-5,7,14,26-tetraazatetracyclo(19.3.1.1(2,6).1(8,12))heptacosa-1(25),2(26),3,5,8(27),9,11,16,21,23-decaeneHomo sapiens (human)Kd30.000011
azd5438Homo sapiens (human)Kd3.238011
pf 04217903Homo sapiens (human)Kd30.000011
gdc 0941Homo sapiens (human)Kd20.000022
icotinibHomo sapiens (human)Kd30.000011
ph 797804Homo sapiens (human)Kd30.000011
kx-01Homo sapiens (human)Kd30.000011
plx 4720Homo sapiens (human)Kd10.000011
mk 5108Homo sapiens (human)Kd30.000011
cx 4945Homo sapiens (human)Kd30.000011
cudc 101Homo sapiens (human)Kd30.000011
arry-614Homo sapiens (human)Kd30.000011
tak 593Homo sapiens (human)Kd30.000011
mln 8237Homo sapiens (human)Kd30.000011
sgx 523Homo sapiens (human)Kd20.000022
bms 754807Homo sapiens (human)Kd30.000011
bms 777607Homo sapiens (human)Kd30.000011
sgi 1776Homo sapiens (human)Kd30.000011
ponatinibHomo sapiens (human)Kd30.000011
amg 900Homo sapiens (human)Kd30.000011
mk-1775Homo sapiens (human)Kd30.000011
AMG-208Homo sapiens (human)Kd30.000011
quizartinibHomo sapiens (human)Kd16.666733
at13148Homo sapiens (human)Kd30.000011
tak 733Homo sapiens (human)Kd30.000011
mk 2206Homo sapiens (human)Kd30.000011
sns 314Homo sapiens (human)Kd30.000011
lucitanibHomo sapiens (human)Kd30.000011
pf-04691502Homo sapiens (human)Kd30.000011
n-(cyanomethyl)-4-(2-((4-(4-morpholinyl)phenyl)amino)-4-pyrimidinyl)benzamideHomo sapiens (human)Kd30.000011
dcc-2036Homo sapiens (human)Kd30.000011
cabozantinibHomo sapiens (human)Kd30.000011
defactinibHomo sapiens (human)Kd30.000011
ly2584702Homo sapiens (human)Kd30.000011
incb-018424Homo sapiens (human)Kd15.900022
poziotinibHomo sapiens (human)Kd30.000011
asp3026Homo sapiens (human)Kd30.000011
entrectinibHomo sapiens (human)Kd30.000011
pexidartinibHomo sapiens (human)Kd30.000011
TAK-580Homo sapiens (human)Kd30.000011
gsk 2126458Homo sapiens (human)Kd30.000012
emd1214063Homo sapiens (human)Kd30.000012
gsk 1838705aHomo sapiens (human)Kd10.000011
pf 3758309Homo sapiens (human)Kd30.000011
gdc 0980Homo sapiens (human)Kd30.000011
azd2014Homo sapiens (human)Kd30.000011
(5-(2,4-bis((3s)-3-methylmorpholin-4-yl)pyrido(2,3-d)pyrimidin-7-yl)-2-methoxyphenyl)methanolHomo sapiens (human)Kd30.000011
plx4032Homo sapiens (human)Kd30.000011
gsk 1363089Homo sapiens (human)Kd20.000022
arry-334543Homo sapiens (human)Kd30.000011
kin-193Homo sapiens (human)Kd30.000011
mk 2461Homo sapiens (human)Kd30.000011
bay 869766Homo sapiens (human)Kd30.000011
as 703026Homo sapiens (human)Kd30.000011
baricitinibHomo sapiens (human)Kd30.000011
dabrafenibHomo sapiens (human)Kd30.000011
pki 587Homo sapiens (human)Kd30.000011
n-(3-fluoro-4-((1-methyl-6-(1h-pyrazol-4-yl)-1h-indazol-5 yl)oxy)phenyl)-1-(4-fluorophenyl)-6-methyl-2-oxo-1,2-dihydropyridine-3-carboxamideHomo sapiens (human)Kd30.000011
ribociclibHomo sapiens (human)Kd30.000011
mk-8033Homo sapiens (human)Kd30.000011
pha 793887Homo sapiens (human)Kd30.000011
sb 1518Homo sapiens (human)Kd30.000011
abemaciclibHomo sapiens (human)Kd30.000011
mk-8776Homo sapiens (human)Kd30.000011
afuresertibHomo sapiens (human)Kd30.000011
gsk 1070916Homo sapiens (human)Kd30.000011
jnj38877605Homo sapiens (human)Kd30.000011
dinaciclibHomo sapiens (human)Kd30.000012
gilteritinibHomo sapiens (human)Kd30.000011
alectinibHomo sapiens (human)Kd30.000011
glpg0634Homo sapiens (human)Kd30.000011
encorafenibHomo sapiens (human)Kd3.334011
bms-911543Homo sapiens (human)Kd30.000012
gsk2141795Homo sapiens (human)Kd1.682011
azd8186Homo sapiens (human)Kd30.000011
byl719Homo sapiens (human)Kd30.000011
cep-32496Homo sapiens (human)Kd30.000011
rociletinibHomo sapiens (human)Kd30.000011
ceritinibHomo sapiens (human)Kd30.000011
azd1208Homo sapiens (human)Kd30.000011
vx-509Homo sapiens (human)Kd30.000011
debio 1347Homo sapiens (human)Kd30.000011
volitinibHomo sapiens (human)Kd30.000011
osimertinibHomo sapiens (human)Kd30.000011
at 9283Homo sapiens (human)Kd30.000011
otssp167Homo sapiens (human)Kd0.931011
chir 258Homo sapiens (human)Kd20.000022
osi 027Homo sapiens (human)Kd30.000012
nintedanibHomo sapiens (human)Kd20.000022
bay 80-6946Homo sapiens (human)Kd30.000011
pp242Homo sapiens (human)Kd0.360011

Drugs with Other Measurements

DrugTaxonomyMeasurementAverage (mM)Bioassay(s)Publication(s)
cyc 202Homo sapiens (human)EC4.980022
longdaysinHomo sapiens (human)EC1.895022

Enables

This protein enables 5 target(s):

TargetCategoryDefinition
protein kinase activitymolecular functionCatalysis of the phosphorylation of an amino acid residue in a protein, usually according to the reaction: a protein + ATP = a phosphoprotein + ADP. [PMID:25399640]
protein serine/threonine kinase activitymolecular functionCatalysis of the reactions: ATP + protein serine = ADP + protein serine phosphate, and ATP + protein threonine = ADP + protein threonine phosphate. [GOC:bf, MetaCyc:PROTEIN-KINASE-RXN, PMID:2956925]
protein bindingmolecular functionBinding to a protein. [GOC:go_curators]
ATP bindingmolecular functionBinding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator. [ISBN:0198506732]
protein serine kinase activitymolecular functionCatalysis of the reactions: ATP + protein serine = ADP + protein serine phosphate. [RHEA:17989]

Located In

This protein is located in 8 target(s):

TargetCategoryDefinition
kinetochorecellular componentA multisubunit complex that is located at the centromeric region of DNA and provides an attachment point for the spindle microtubules. [GOC:elh]
centrosomecellular componentA structure comprised of a core structure (in most organisms, a pair of centrioles) and peripheral material from which a microtubule-based structure, such as a spindle apparatus, is organized. Centrosomes occur close to the nucleus during interphase in many eukaryotic cells, though in animal cells it changes continually during the cell-division cycle. [GOC:mah, ISBN:0198547684]
spindlecellular componentThe array of microtubules and associated molecules that forms between opposite poles of a eukaryotic cell during mitosis or meiosis and serves to move the duplicated chromosomes apart. [ISBN:0198547684]
cytosolcellular componentThe part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes. [GOC:hjd, GOC:jl]
ciliumcellular componentA specialized eukaryotic organelle that consists of a filiform extrusion of the cell surface and of some cytoplasmic parts. Each cilium is largely bounded by an extrusion of the cytoplasmic (plasma) membrane, and contains a regular longitudinal array of microtubules, anchored to a basal body. [GOC:cilia, GOC:curators, GOC:kmv, GOC:vw, ISBN:0198547684, PMID:16824949, PMID:17009929, PMID:20144998]
membranecellular componentA lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it. [GOC:dos, GOC:mah, ISBN:0815316194]
nuclear speckcellular componentA discrete extra-nucleolar subnuclear domain, 20-50 in number, in which splicing factors are seen to be localized by immunofluorescence microscopy. [http://www.cellnucleus.com/]
ciliary basal bodycellular componentA membrane-tethered, short cylindrical array of microtubules and associated proteins found at the base of a eukaryotic cilium (also called flagellum) that is similar in structure to a centriole and derives from it. The cilium basal body is the site of assembly and remodeling of the cilium and serves as a nucleation site for axoneme growth. As well as anchoring the cilium, it is thought to provide a selective gateway regulating the entry of ciliary proteins and vesicles by intraflagellar transport. [GOC:cilia, GOC:clt, PMID:21750193]

Active In

This protein is active in 2 target(s):

TargetCategoryDefinition
cytoplasmcellular componentThe contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures. [ISBN:0198547684]
nucleuscellular componentA membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent. [GOC:go_curators]

Part Of

This protein is part of 2 target(s):

TargetCategoryDefinition
mRNA cleavage and polyadenylation specificity factor complexcellular componentA multisubunit complex that binds to the canonical AAUAAA hexamer and to U-rich upstream sequence elements on the pre-mRNA, thereby stimulating the otherwise weakly active and nonspecific polymerase to elongate efficiently RNAs containing a poly(A) signal. [PMID:14749727]
beta-catenin destruction complexcellular componentA cytoplasmic protein complex containing glycogen synthase kinase-3-beta (GSK-3-beta), the adenomatous polyposis coli protein (APC), and the scaffolding protein axin, among others; phosphorylates beta-catenin, targets it for degradation by the proteasome. [PMID:14600025]

Involved In

This protein is involved in 16 target(s):

TargetCategoryDefinition
protein phosphorylationbiological processThe process of introducing a phosphate group on to a protein. [GOC:hb]
Golgi organizationbiological processA process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of the Golgi apparatus. [GOC:dph, GOC:jl, GOC:mah]
cell surface receptor signaling pathwaybiological processThe series of molecular signals initiated by an extracellular ligand binding to a receptor located on the cell surface. The pathway ends with regulation of a downstream cellular process, e.g. transcription. [GOC:signaling]
Wnt signaling pathwaybiological processThe series of molecular signals initiated by binding of a Wnt protein to a frizzled family receptor on the surface of a target cell and ending with a change in cell state. [PMID:11532397]
peptidyl-serine phosphorylationbiological processThe phosphorylation of peptidyl-serine to form peptidyl-O-phospho-L-serine. [RESID:AA0037]
viral protein processingbiological processAny protein maturation process achieved by the cleavage of a peptide bond or bonds within a viral protein. [GOC:bf, GOC:jl, ISBN:0781702534]
cellular response to nutrientbiological processAny process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a nutrient stimulus. [GOC:mah]
positive regulation of proteasomal ubiquitin-dependent protein catabolic processbiological processAny process that activates or increases the frequency, rate or extent of the breakdown of a protein or peptide by hydrolysis of its peptide bonds, initiated by the covalent attachment of ubiquitin, and mediated by the proteasome. [GOC:mah]
positive regulation of Rho protein signal transductionbiological processAny process that activates or increases the frequency, rate or extent of Rho protein signal transduction. [GOC:bf]
proteasome-mediated ubiquitin-dependent protein catabolic processbiological processThe chemical reactions and pathways resulting in the breakdown of a protein or peptide by hydrolysis of its peptide bonds, initiated by the covalent attachment of ubiquitin, and mediated by the proteasome. [GOC:go_curators]
intermediate filament cytoskeleton organizationbiological processA process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of cytoskeletal structures comprising intermediate filaments and their associated proteins. [GOC:ai]
cell divisionbiological processThe process resulting in division and partitioning of components of a cell to form more cells; may or may not be accompanied by the physical separation of a cell into distinct, individually membrane-bounded daughter cells. [GOC:di, GOC:go_curators, GOC:pr]
negative regulation of canonical Wnt signaling pathwaybiological processAny process that decreases the rate, frequency, or extent of the Wnt signaling pathway through beta-catenin, the series of molecular signals initiated by binding of a Wnt protein to a frizzled family receptor on the surface of the target cell, followed by propagation of the signal via beta-catenin, and ending with a change in transcription of target genes. [GOC:dph, GOC:tb]
negative regulation of NLRP3 inflammasome complex assemblybiological processAny process that stops, prevents or reduces the frequency, rate or extent of NLRP3 inflammasome complex assembly. [GOC:TermGenie]
positive regulation of TORC1 signalingbiological processAny process that activates or increases the frequency, rate or extent of TORC1 signaling. [GO_REF:0000058, GOC:TermGenie, PMID:25366275]
signal transductionbiological processThe cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell. [GOC:go_curators, GOC:mtg_signaling_feb11]