Page last updated: 2024-10-24

Bcl3/NF-kappaB2 complex

Definition

Target type: cellularcomponent

A protein complex containing one Bcl protein and one or more copies of NF-kappaB2; formation of complexes of different stoichiometry depends on the Bcl3:NF-kappaB2 ratio, and allow Bcl3 to exert different regulatory effects on NF-kappaB2-dependent transcription. [GOC:mah, PMID:9407099]

The Bcl3/NF-kappaB2 complex is a transcription factor complex that plays a role in the regulation of gene expression. The cellular component of this complex consists of the following components:

1. **Bcl3:** Bcl3 is a member of the IkappaB family of proteins, which are known to inhibit the activity of NF-kappaB. However, Bcl3 acts as a co-activator of NF-kappaB, rather than an inhibitor. Bcl3 binds to the p50/p65 heterodimer of NF-kappaB, and this interaction is essential for the transcriptional activity of the complex.

2. **NF-kappaB2 (p52/p100):** NF-kappaB2 is a heterodimer composed of the p52 and p100 subunits. p100 is a precursor protein that is processed by the proteasome to generate the active p52 subunit. p52 can form a heterodimer with RelA (p65), RelB, or c-Rel, but it is typically associated with Bcl3.

3. **DNA:** The Bcl3/NF-kappaB2 complex binds to specific DNA sequences, known as kappaB sites, in the promoters of target genes. These kappaB sites are typically located within 50 bp of the transcription start site.

4. **Other proteins:** In addition to Bcl3, NF-kappaB2, and DNA, the Bcl3/NF-kappaB2 complex may also interact with other proteins, such as histone acetyltransferases (HATs), which are involved in the regulation of chromatin structure.

The Bcl3/NF-kappaB2 complex is involved in a variety of cellular processes, including inflammation, immune responses, cell growth, and development. It is also implicated in the pathogenesis of various diseases, such as cancer, autoimmune disorders, and neurodegenerative diseases.'
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Proteins (1)

ProteinDefinitionTaxonomy
Nuclear factor NF-kappa-B p100 subunit A nuclear factor NF-kappa-B p100 subunit that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q00653]Homo sapiens (human)

Compounds (39)

CompoundDefinitionClassesRoles
beta-lapachonebeta-lapachone : A benzochromenone that is 3,4-dihydro-2H-benzo[h]chromene-5,6-dione substituted by geminal methyl groups at position 2. Isolated from Tabebuia avellanedae, it exhibits antineoplastic and anti-inflammatory activities.

beta-lapachone: antineoplastic inhibitor of reverse transcriptase, DNA topoisomerase, and DNA polymerase
benzochromenone;
orthoquinones
anti-inflammatory agent;
antineoplastic agent;
plant metabolite
phloretindihydrochalconesantineoplastic agent;
plant metabolite
sanguinarinebenzophenanthridine alkaloid : A specific group of isoquinoline alkaloids that occur only in higher plants and are constituents mainly of the Papaveraceae family.alkaloid antibiotic;
benzophenanthridine alkaloid;
botanical anti-fungal agent
helenalinhelenalin : A sesquiterpene lactone that is 3,3a,4,4a,7a,8,9,9a-octahydroazuleno[6,5-b]furan-2,5-dione substituted by a hydroxy group at position 4, methyl groups at positions 4a and 8 and a methylidene group at position 3 (the 3aS,4S,4aR,7aR,8R,9aR stereoisomer).

helenalin: toxic principle of Helenium microcephalum (smallhead sneezeweed); structure

NF-kappaB inhibitor : An inhibitor of NF-kappaB (nuclear factor kappa-light-chain-enhancer of activated B cells), a protein complex involved in the transcription of DNA.
cyclic ketone;
gamma-lactone;
organic heterotricyclic compound;
secondary alcohol;
sesquiterpene lactone
anti-inflammatory agent;
antineoplastic agent;
metabolite;
plant metabolite
pyrrolidine dithiocarbamatepyrrolidine dithiocarbamate : A member of the class of dithiocarbamic acids that is the N-dithiocarboxy derivative of pyrrolidine.

pyrrolidine dithiocarbamic acid: spelled pyrolidine in J Nutr 1979 reference; RN given refers to parent cpd
dithiocarbamic acids;
pyrrolidines
anticonvulsant;
antineoplastic agent;
geroprotector;
neuroprotective agent;
NF-kappaB inhibitor;
radical scavenger
dehydroleucodinedehydroleucodine: has antimicrobial activity; RN given refers to (3aS-(3aalpha,9aalpha,9bbeta))-isomer
altersolanol aaltersolanol A: isolated from fermentation product of fungus Alternaria porri(Ellis) Ciferri;RN given refers to (1R-(1alpha,2beta,3beta,4alpha))-isomer; structure given in first sourcepentahydroxyanthraquinone
Mexicanin Isesquiterpene lactone
tetrahydrocurcumintetrahydrocurcumin : A beta-diketone that is curcumin in which both of the double bonds have been reduced to single bonds.beta-diketone;
diarylheptanoid;
polyphenol
metabolite
withanolide dwithanolide D : A withanolide that is 5,6:22,26-diepoxyergosta-2,24-diene-1,26-dione substituted by hydroxy groups at positions 4 and 22 (the 4beta,5beta,6beta,22R stereoisomer). Isolated from Tubocapsicum anomalum and Withania somnifera, it exhibits cytotoxic activity.

withanolide D: structure
20-hydroxy steroid;
4-hydroxy steroid;
delta-lactone;
enone;
epoxy steroid;
ergostanoid;
secondary alcohol;
tertiary alcohol;
withanolide
antineoplastic agent
arnicolide darnicolide D: cytotoxic; from Centipeda minima L.; structure in first sourcesesquiterpene lactone
santamarinesantamarin : A sesquiterpene lactone of the eudesmanolide group.

santamarine: sesquiterpene derivative of costunolide
sesquiterpene lactone
withaferin awithaferin A : A withanolide that is 5,6:22,26-diepoxyergosta-2,24-diene-1,26-dione substituted by hydroxy groups at positions 4 and 27 (the 4beta,5beta,6beta,22R stereoisomer). Isolated from Physalis longifolia, it exhibits cytotoxic activity.

withaferin A: an antiestrogen and phytogenic antineoplastic agent isolated from leaves of Withania somnifera Dun.; structure
27-hydroxy steroid;
4-hydroxy steroid;
delta-lactone;
enone;
epoxy steroid;
ergostanoid;
primary alcohol;
secondary alcohol;
withanolide
antineoplastic agent;
apoptosis inducer
bortezomibamino acid amide;
L-phenylalanine derivative;
pyrazines
antineoplastic agent;
antiprotozoal drug;
protease inhibitor;
proteasome inhibitor
tosylphenylalanyl chloromethyl ketoneN-tosyl-L-phenylalanyl chloromethyl ketone : The N-tosyl derivative of L-phenylalanyl chloromethyl ketone.

Tosylphenylalanyl Chloromethyl Ketone: An inhibitor of Serine Endopeptidases. Acts as alkylating agent and is known to interfere with the translation process.
alpha-chloroketone;
sulfonamide
alkylating agent;
serine proteinase inhibitor
11alpha,13-dihydrohelenalinsesquiterpene lactone
resveratroltrans-resveratrol : A resveratrol in which the double bond has E configuration.resveratrolantioxidant;
phytoalexin;
plant metabolite;
quorum sensing inhibitor;
radical scavenger
isoliquiritigeninchalconesantineoplastic agent;
biological pigment;
EC 1.14.18.1 (tyrosinase) inhibitor;
GABA modulator;
geroprotector;
metabolite;
NMDA receptor antagonist
xanthohumolxanthohumol : A member of the class of chalcones that is trans-chalcone substituted by hydroxy groups at positions 4, 2' and 4', a methoxy group at position 6' and a prenyl group at position 3'. Isolated from Humulus lupulus, it induces apoptosis in human malignant glioblastoma cells.

xanthohumol: from hop plant, Humulus lupulus
aromatic ether;
chalcones;
polyphenol
anti-HIV-1 agent;
antineoplastic agent;
antiviral agent;
apoptosis inducer;
EC 2.3.1.20 (diacylglycerol O-acyltransferase) inhibitor;
metabolite
parthenolide, (1ar-(1ar*,4e,7as*,10as*,10br*))-isomergermacranolide
lipoxin a4lipoxin A4 : A C20 hydroxy fatty acid having (5S)-, (6R)- and (15S)-hydroxy groups as well as (7E)- (9E)-, (11Z)- and (13E)-double bonds.

lipoxin A4: an antifibrolytic agent; structure given in first source; a role in ASPIRIN antiinflammatory activity
hydroxy polyunsaturated fatty acid;
lipoxin;
long-chain fatty acid
human metabolite;
metabolite
buteinchalcones;
polyphenol
antineoplastic agent;
antioxidant;
EC 1.1.1.21 (aldehyde reductase) inhibitor;
geroprotector;
hypoglycemic agent;
plant metabolite;
radiosensitizing agent;
tyrosine kinase inhibitor
molephantininmolephantinin: germacranolide from Elephantopus mollis; RN given refers to (3aR-(3aR*,4S*(E),6E,9Z,11S*,11aS*))-isomer; structure in first sourcegermacranolide
4-hydroxychalcone4-hydroxychalcone : A member of the class of chalcones that is trans-chalcone substituted by a hydroxy group at position 4.

4-hydroxychalcone: structure in first source
chalcones;
phenols
antihypertensive agent;
plant metabolite
bay 11-7082(E)-3-tosylacrylonitrile : A nitrile that is acrylonitrile in which the hydrogen located beta,trans to the cyano group is replaced by a tosyl group. It is an inhibitor of cytokine-induced IkappaB-alpha phosphorylation in cells.nitrile;
sulfone
apoptosis inducer;
EC 2.7.11.10 (IkappaB kinase) inhibitor;
EC 3.1.3.48 (protein-tyrosine-phosphatase) inhibitor;
non-steroidal anti-inflammatory drug;
platelet aggregation inhibitor
furanoheliangolidefuranoheliangolide: structure in first source
flavokawain Cflavokawain C: antineoplastic from roots of Kava (Piper methysticum Forst); structure in first sourcechalcones
rehmannic acidrehmannic acid: toxic principle, triterpene acid from Lantana camara; RN given refers to (22beta-(Z))-isomer; structure
3-o-methylbutein3-O-methylbutein: RN given refers to (E)-isomer; structure given in first sourcechalcones
goniothalamingoniothalamin: has antineoplastic activity; structure given in first source
hylin
spc-839SPC-839: an inhibitor of activator protein 1; structure in first source
sp 100030N-(3,5-bis(trifluoromethyl)phenyl)-2-chloro-4-(trifluoromethyl)pyrimidine-5-carboxamide: transcription factor inhibitor specific to T-cells
cumambrin bcumambrin B: RN given for (3aR-(3aalpha,4alpha,6alpha,6aalpha,9aalpha,9bbeta))-isomer; isolated from Chrysanthemum boreale; structure in first source
6-hydroxy-7-methoxychroman-2-carboxylic acid phenylamide6-hydroxy-7-methoxychroman-2-carboxylic acid phenylamide: structure in first souce
lantadene blantadene B: RN given refers to the (22beta)-isomer; from Lantana camara
achalensolideachalensolide: structure in first source
2,3-dihydro-3beta-O-sulfate withaferin A2,3-dihydro-3beta-O-sulfate withaferin A : A withanolide that is 2,3-dihydrowithaferin A substituted by a sulfoxy group at position 3. Isolated from Physalis longifolia, it exhibits antineoplastic activity.27-hydroxy steroid;
4-hydroxy steroid;
delta-lactone;
epoxy steroid;
ergostanoid;
primary alcohol;
steroid sulfate;
withanolide
antineoplastic agent;
metabolite;
plant metabolite
hydrazinocurcuminhydrazinocurcumin : A pyrazole obtained by cyclocodensation of the two carbonyl groups of curcumin with hydrazine.

hydrazinocurcumin: structure in first source
aromatic ether;
olefinic compound;
polyphenol;
pyrazoles
angiogenesis modulating agent;
antineoplastic agent;
EC 2.3.1.48 (histone acetyltransferase) inhibitor;
EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor