Page last updated: 2024-10-24

pore complex assembly

Definition

Target type: biologicalprocess

The aggregation, arrangement and bonding together of a set of components to form a pore complex. A pore complex is a small opening in a membrane that allows the passage of liquids and/or gases. [GOC:jl, GOC:mah]

The nuclear pore complex (NPC) is a large, intricate protein structure that spans the nuclear envelope, the double membrane that encloses the eukaryotic nucleus. It serves as the sole gateway for the transport of molecules between the nucleus and cytoplasm, playing a critical role in maintaining the integrity and functionality of the cell. The assembly of the NPC is a complex process involving multiple steps, including the initial formation of a scaffold structure, the recruitment of specific nucleoporins (proteins that constitute the NPC), and the precise arrangement of these proteins into a functional complex. The process is tightly regulated, ensuring proper assembly and the formation of a robust and selective barrier.

The assembly of the NPC begins with the formation of a scaffold structure, which serves as a foundation for the complex. This scaffold is typically formed by a specific set of nucleoporins that interact with the nuclear envelope and with each other. These nucleoporins often possess unique structural features, such as coiled-coil domains, that allow them to assemble into stable and elongated structures.

Once the scaffold is established, other nucleoporins are recruited to the complex. These nucleoporins can be broadly classified into two categories: transmembrane nucleoporins and soluble nucleoporins. Transmembrane nucleoporins are anchored to the nuclear envelope and form the structural core of the NPC. They interact with the scaffold nucleoporins and with each other to form a stable framework. Soluble nucleoporins are found within the central channel of the NPC and are involved in regulating the transport of molecules.

The assembly of the NPC is not a passive process. It is actively regulated by a complex network of interactions between nucleoporins, chaperone proteins, and other cellular factors. These interactions ensure that the NPC is assembled in a precise and ordered manner, with each nucleoporin occupying its specific location within the complex.

As the NPC assembles, it gradually acquires its characteristic shape and structure. This includes the formation of a central channel lined with soluble nucleoporins, which acts as a selective barrier for the transport of molecules. The NPC also develops a basket-like structure on the nuclear side, which serves as a docking site for nuclear transport receptors.

The assembly of the NPC is a dynamic process, with individual nucleoporins constantly exchanging and the complex undergoing constant remodeling. This dynamic nature allows the NPC to adapt to changing cellular conditions and to maintain its functionality over time.

In conclusion, the assembly of the NPC is a complex and highly orchestrated process that involves the coordinated action of multiple proteins and cellular factors. The NPC is a vital component of the eukaryotic cell, ensuring the efficient and selective transport of molecules between the nucleus and cytoplasm. Understanding the process of NPC assembly is critical for elucidating the mechanisms underlying nuclear transport and for gaining insights into the regulation of gene expression and other cellular processes.'
"

Proteins (4)

ProteinDefinitionTaxonomy
P2X purinoceptor 7A P2X purinoceptor 7 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q99572]Homo sapiens (human)
Bcl2-associated agonist of cell death A Bcl2-associated agonist of cell death that is encoded in the genome of human. [PRO:WCB, UniProtKB:Q92934]Homo sapiens (human)
Gasdermin-DA gasdermin-D that is encoded in the genome of human. [PRO:DNx, UniProtKB:P57764]Homo sapiens (human)
Disintegrin and metalloproteinase domain-containing protein 10A disintegrin and metalloproteinase domain-containing protein 10 that is encoded in the genome of human. [PRO:WCB, UniProtKB:O14672]Homo sapiens (human)

Compounds (33)

CompoundDefinitionClassesRoles
disulfiramorganic disulfide;
organosulfur acaricide
angiogenesis inhibitor;
antineoplastic agent;
apoptosis inducer;
EC 1.2.1.3 [aldehyde dehydrogenase (NAD(+))] inhibitor;
EC 3.1.1.1 (carboxylesterase) inhibitor;
EC 3.1.1.8 (cholinesterase) inhibitor;
EC 5.99.1.2 (DNA topoisomerase) inhibitor;
ferroptosis inducer;
fungicide;
NF-kappaB inhibitor
gossypolGossypol: A dimeric sesquiterpene found in cottonseed (GOSSYPIUM). The (-) isomer is active as a male contraceptive (CONTRACEPTIVE AGENTS, MALE) whereas toxic symptoms are associated with the (+) isomer.
oxatomideoxatomide : A member of the class of benzimidazoles that is 1,3-dihydro-2H-benzimidazol-2-one substituted by a 3-[4-(diphenylmethyl)piperazin-1-yl]propyl group at position 1. It is an anti-allergic drug.

oxatomide: structure; an anti-allergic & an anti-asthmatic
benzimidazoles;
diarylmethane;
N-alkylpiperazine
anti-allergic agent;
anti-inflammatory agent;
geroprotector;
H1-receptor antagonist;
serotonergic antagonist
pyridoxal phosphate-6-azophenyl-2',4'-disulfonic acid5'-phosphopyridoxal-6-azobenzene-2,4-disulfonic acid : An arenesulfonic acid that is pyridoxal 5'-phosphate carrying an additional 2,4-disulfophenylazo substituent at position 6.

pyridoxal phosphate-6-azophenyl-2',4'-disulfonic acid: a novel antagonist that selectively blocks P2 purinoceptor receptors; a useful tool to study co-transmission in tissues when ATP and coexisting neurotransmitters act in concert
arenesulfonic acid;
azobenzenes;
methylpyridines;
monohydroxypyridine;
organic phosphate;
pyridinecarbaldehyde
purinergic receptor P2X antagonist
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
suraminsuramin : A member of the class of phenylureas that is urea in which each of the amino groups has been substituted by a 3-({2-methyl-5-[(4,6,8-trisulfo-1-naphthyl)carbamoyl]phenyl}carbamoyl)phenyl group. An activator of both the rabbit skeletal muscle RyR1 and sheep cardiac RyR2 isoform ryanodine receptor channels, it has been used for the treatment of human African trypanosomiasis for over 100 years.

Suramin: A polyanionic compound with an unknown mechanism of action. It is used parenterally in the treatment of African trypanosomiasis and it has been used clinically with diethylcarbamazine to kill the adult Onchocerca. (From AMA Drug Evaluations Annual, 1992, p1643) It has also been shown to have potent antineoplastic properties.
naphthalenesulfonic acid;
phenylureas;
secondary carboxamide
angiogenesis inhibitor;
antinematodal drug;
antineoplastic agent;
apoptosis inhibitor;
EC 2.7.11.13 (protein kinase C) inhibitor;
GABA antagonist;
GABA-gated chloride channel antagonist;
purinergic receptor P2 antagonist;
ryanodine receptor agonist;
trypanocidal drug
ditiocarbdiethyldithiocarbamic acid : A member of the class of dithiocarbamic acids that is diethylcarbamic acid in which both of the oxygens are replaced by sulfur.

Ditiocarb: A chelating agent that has been used to mobilize toxic metals from the tissues of humans and experimental animals. It is the main metabolite of DISULFIRAM.
dithiocarbamic acidschelator;
copper chelator
epigallocatechin gallate(-)-epigallocatechin 3-gallate : A gallate ester obtained by the formal condensation of gallic acid with the (3R)-hydroxy group of (-)-epigallocatechin.

epigallocatechin gallate: a steroid 5alpha-reductase inhibitor and antimutagen in green tea (Camellia sinensis)
flavans;
gallate ester;
polyphenol
antineoplastic agent;
antioxidant;
apoptosis inducer;
geroprotector;
Hsp90 inhibitor;
neuroprotective agent;
plant metabolite
5,6,7,8-tetrahydro-1-naphthol5,6,7,8-tetrahydro-1-naphthol : 1-naphthol hydrogenated at C-5, -6, -7 and -8.tetralins
chelerythrine chloride
alpha,beta-methyleneadenosine 5'-triphosphatealpha,beta-methyleneadenosine 5'-triphosphate: do not confuse with beta,gamma-methylene ATP; RN given refers to parent cpdnucleoside triphosphate analogue
ilomastatCS 610: matrix metalloproteinase inhibitor; structure in first source

ilomastat : An N-acyl-amino acid obtained by formal condensation of the carboxy group of (2R)-2-[2-(hydroxyamino)-2-oxoethyl]-4-methylpentanoic acid with the amino group of N-methyl-L-tryptophanamide. A cell permeable broad-spectrum matrix metalloproteinase (MMP) inhibitor
hydroxamic acid;
L-tryptophan derivative;
N-acyl-amino acid
anti-inflammatory agent;
antibacterial agent;
antineoplastic agent;
EC 3.4.24.24 (gelatinase A) inhibitor;
neuroprotective agent
sb 203580imidazoles;
monofluorobenzenes;
pyridines;
sulfoxide
EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor;
EC 2.7.11.24 (mitogen-activated protein kinase) inhibitor;
geroprotector;
Hsp90 inhibitor;
neuroprotective agent
8-azidoadenosine 5'-triphosphate
6-thioinosine-5'-triphosphateorganic molecule
mrs2159MRS2159: an antagonist of both P2X1 and P2X7 receptors
imd 0354N-(3,5-bis(trifluoromethyl)phenyl)-5-chloro-2-hydroxybenzamide: a cardioprotective agent that inhibits IkappaB kinase beta (IKKbeta); structure in first sourcebenzamides
kn 62KN 62: inhibitor of Ca/calmodulin-dependent protein kinase IIpiperazines
az 11645373AZ 11645373: InChIKey: VQEHBLGYANQWEA-UHFFFAOYSA-N
az10606120AZ10606120: a P2X7 receptor antagonist
abt-737aromatic amine;
aryl sulfide;
biphenyls;
C-nitro compound;
monochlorobenzenes;
N-arylpiperazine;
N-sulfonylcarboxamide;
secondary amino compound;
tertiary amino compound
anti-allergic agent;
anti-inflammatory agent;
antineoplastic agent;
apoptosis inducer;
B-cell lymphoma 2 inhibitor
bms-566394BMS-566394: structure in first source
ce 224,535CE 224,535: structure in first source
incb3619INCB3619: ADAM inhibitor; structure in first source
a-438079
af 3535-(5-iodo-2-isopropyl-4-methoxyphenoxy)pyrimidine-2,4-diamine: a P2X3 and P2X2/3 receptor antagonist; structure in first source
gsk1482160
navitoclaxaryl sulfide;
monochlorobenzenes;
morpholines;
N-sulfonylcarboxamide;
organofluorine compound;
piperazines;
secondary amino compound;
sulfone;
tertiary amino compound
antineoplastic agent;
apoptosis inducer;
B-cell lymphoma 2 inhibitor
grassystatin agrassystatin A: isolated from a cyanobacterium, identified as Lyngbya cf.; structure in first source
abt-199venetoclax : A member of the class of pyrrolopyridines that is a potent inhibitor of the antiapoptotic protein B-cell lymphoma 2. It is used for treamtment of chronic lymphocytic leukemia with 17p deletion.

venetoclax: A BCL-2 inhibitor with antineoplastic activity that is used in the treatment of CHRONIC LYMPHOCYTIC LEUKEMIA associated with chromosome 17p deletion; structure in first source.
aromatic ether;
C-nitro compound;
monochlorobenzenes;
N-alkylpiperazine;
N-arylpiperazine;
N-sulfonylcarboxamide;
oxanes;
pyrrolopyridine
antineoplastic agent;
apoptosis inducer;
B-cell lymphoma 2 inhibitor
a-839977A-839977: a selective P2X7 receptor antagonist, analgesic; structure in first source
jnj-47965567JNJ-47965567: a P2X7 purinergic receptor antagonist; structure in first source
mk-8742elbasvir : A complex organic heterotetracyclic compound that is a hepatitis C virus nonstructural protein 5A inhibitor used in combination with grazoprevir (under the brand name Zepatier) for treatment of chronic HCV genotypes 1 or 4 infection in adults.

elbasvir: inhibits NS5A protein of hepatitis C virus
carbamate ester;
imidazoles;
L-valine derivative;
N-acylpyrrolidine;
organic heterotetracyclic compound;
ring assembly
antiviral drug;
hepatitis C virus nonstructural protein 5A inhibitor;
hepatoprotective agent