Descriptions

PARP2, also known as ARTD2, is an enzyme that becomes activated by DNA damage, specifically by 5′-phosphorylated DNA ends. It catalyzes poly-ADP-ribosylation, a post-translational modification involved in DNA repair processes. PARP2 plays a crucial role in DNA damage detection and repair, with its activity being essential for maintaining genomic stability and proper cellular function in response to genotoxic stress. In its inactive state, PARP2’s regulatory domain (RD) covers the active site, preventing substrate NAD+ binding. DNA damage recognition leads to RD unfolding and reorganization, enabling the enzyme to access and modify target macromolecules for ADP-ribosylation. The activation of PARP2 by DNA damage induces significant conformational changes in the enzyme, which relieve its autoinhibited state. This allows PARP2 to bind NAD+ and histone PARylation factor 1 (HPF1), altering its residue specificity during DNA repair.

Autoinhibitory domains (AIDs)

Target domain

787-1013 (ART domain)

Relief mechanism

Ligand binding, Others

Assay

Accessory elements

No accessory elements

Autoinhibited structure

Activated structure

0 structures for Q5RHR0

Entry ID Method Resolution Chain Position Source
No available structures

No variants for Q5RHR0

Variant ID(s) Position Change Description Diseaes Association Provenance
No variants for Q5RHR0

No associated diseases with Q5RHR0

8 regional properties for Q5RHR0

Type Name Position InterPro Accession
domain BRCT domain 385 - 466 IPR001357
domain Zinc finger, PARP-type 10 - 92 IPR001510-1
domain Zinc finger, PARP-type 113 - 203 IPR001510-2
domain Poly(ADP-ribose) polymerase, regulatory domain 661 - 793 IPR004102
domain WGR domain 541 - 637 IPR008893
domain Poly(ADP-ribose) polymerase, catalytic domain 787 - 1013 IPR012317
domain PARP1-like, PADR1 domain, zinc ribbon fold 286 - 325 IPR012982
domain PARP1-like, PADR1 domain, N-terminal helical subdomain 225 - 284 IPR049296

Functions

Description
EC Number 2.4.2.30 Pentosyltransferases
Subcellular Localization
  • Chromosome
  • Nucleus
  • Nucleus, nucleolus
  • Cytoplasm, cytosol
  • Localizes to sites of DNA damage
  • Recognizes (via PARP-type zinc-fingers) and binds DNA strand breaks
  • Also binds normal/undamaged chromatin
  • Auto poly-ADP-ribosylation promotes dissociation from chromatin
PANTHER Family
PANTHER Subfamily
PANTHER Protein Class
PANTHER Pathway Category No pathway information available

6 GO annotations of cellular component

Name Definition
chromatin The ordered and organized complex of DNA, protein, and sometimes RNA, that forms the chromosome.
cytosol The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
nuclear replication fork The Y-shaped region of a nuclear replicating DNA molecule, resulting from the separation of the DNA strands and in which the synthesis of new strands takes place. Also includes associated protein complexes.
nucleolus A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome.
nucleus A 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.
site of DNA damage A region of a chromosome at which DNA damage has occurred. DNA damage signaling and repair proteins accumulate at the lesion to respond to the damage and repair the DNA to form a continuous DNA helix.

14 GO annotations of molecular function

Name Definition
damaged DNA binding Binding to damaged DNA.
DNA binding Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
NAD binding Binding to nicotinamide adenine dinucleotide, a coenzyme involved in many redox and biosynthetic reactions; binding may be to either the oxidized form, NAD+, or the reduced form, NADH.
NAD+ ADP-ribosyltransferase activity Catalysis of the reaction
NAD+- protein-aspartate ADP-ribosyltransferase activity Catalysis of the reaction
NAD+-protein ADP-ribosyltransferase activity Catalysis of the reaction
NAD+-protein-glutamate ADP-ribosyltransferase activity Catalysis of the reaction
NAD+-protein-histidine ADP-ribosyltransferase activity Catalysis of the reaction
NAD+-protein-serine ADP-ribosyltransferase activity Catalysis of the reaction
NAD+-protein-tyrosine ADP-ribosyltransferase activity Catalysis of the reaction
nucleosome binding Binding to a nucleosome, a complex comprised of DNA wound around a multisubunit core and associated proteins, which forms the primary packing unit of DNA into higher order structures.
nucleotidyltransferase activity Catalysis of the transfer of a nucleotidyl group to a reactant.
protein homodimerization activity Binding to an identical protein to form a homodimer.
zinc ion binding Binding to a zinc ion (Zn).

9 GO annotations of biological process

Name Definition
apoptotic process A programmed cell death process which begins when a cell receives an internal (e.g. DNA damage) or external signal (e.g. an extracellular death ligand), and proceeds through a series of biochemical events (signaling pathway phase) which trigger an execution phase. The execution phase is the last step of an apoptotic process, and is typically characterized by rounding-up of the cell, retraction of pseudopodes, reduction of cellular volume (pyknosis), chromatin condensation, nuclear fragmentation (karyorrhexis), plasma membrane blebbing and fragmentation of the cell into apoptotic bodies. When the execution phase is completed, the cell has died.
DNA repair The process of restoring DNA after damage. Genomes are subject to damage by chemical and physical agents in the environment (e.g. UV and ionizing radiations, chemical mutagens, fungal and bacterial toxins, etc.) and by free radicals or alkylating agents endogenously generated in metabolism. DNA is also damaged because of errors during its replication. A variety of different DNA repair pathways have been reported that include direct reversal, base excision repair, nucleotide excision repair, photoreactivation, bypass, double-strand break repair pathway, and mismatch repair pathway.
double-strand break repair The repair of double-strand breaks in DNA via homologous and nonhomologous mechanisms to reform a continuous DNA helix.
innate immune response Innate immune responses are defense responses mediated by germline encoded components that directly recognize components of potential pathogens.
negative regulation of innate immune response Any process that stops, prevents, or reduces the frequency, rate or extent of the innate immune response.
negative regulation of transcription by RNA polymerase II Any process that stops, prevents, or reduces the frequency, rate or extent of transcription mediated by RNA polymerase II.
protein auto-ADP-ribosylation The ADP-ribosylation by a protein of one or more of its own amino acid residues, or residues on an identical protein.
regulation of circadian sleep/wake cycle, sleep Any process that modulates the frequency, rate or extent of sleep; a readily reversible state of reduced awareness and metabolic activity that occurs periodically in many animals.
replication fork reversal Replication fork processing that involves the unwinding of blocked forks to form four-stranded structures resembling Holliday junctions, which are subsequently resolved.

14 homologous proteins in AiPD

UniProt AC Gene Name Protein Name Species Evidence Code
P18493 PARP1 Poly [ADP-ribose] polymerase 1 Bos taurus (Bovine) SS
P26446 PARP1 Poly [ADP-ribose] polymerase 1 Gallus gallus (Chicken) SS
P35875 Parp Poly [ADP-ribose] polymerase Drosophila melanogaster (Fruit fly) SS
Q9UGN5 PARP2 Poly [ADP-ribose] polymerase 2 Homo sapiens (Human) EV
Q9Y6F1 PARP3 Protein mono-ADP-ribosyltransferase PARP3 Homo sapiens (Human) PR
P09874 PARP1 Poly [ADP-ribose] polymerase 1 Homo sapiens (Human) SS
O50017 PARP2 Poly [ADP-ribose] polymerase 2 Zea mays (Maize) SS
O88554 Parp2 Poly [ADP-ribose] polymerase 2 Mus musculus (Mouse) SS
P11103 Parp1 Poly [ADP-ribose] polymerase 1 Mus musculus (Mouse) SS
P27008 Parp1 Poly [ADP-ribose] polymerase 1 Rattus norvegicus (Rat) SS
Q0JMY1 PARP2-B Poly [ADP-ribose] polymerase 2-B Oryza sativa subsp. japonica (Rice) SS
Q5Z8Q9 PARP2-A Poly [ADP-ribose] polymerase 2-A Oryza sativa subsp. japonica (Rice) SS
Q11207 PARP2 Poly [ADP-ribose] polymerase 2 Arabidopsis thaliana (Mouse-ear cress) SS
Q9ZP54 PARP1 Poly [ADP-ribose] polymerase 1 Arabidopsis thaliana (Mouse-ear cress) SS
10 20 30 40 50 60
MADSQDDKLY KAEYAKSGRA SCKKCKDNIA KDSLRMAIMV QSPMFDGKVP HWHHFSCFWL
70 80 90 100 110 120
RAAVQSPSDI SGFTDLRWDD QEKVKTAIES GGATGGKGGQ KGAAKGEKTL NDFAVEYAKS
130 140 150 160 170 180
NRSTCKGCDQ KIEKDQIRVS KKTVDPEKPQ LGLIDRWYHT GCFVSRREEL IFKPEYSAAQ
190 200 210 220 230 240
LKGFAVLRDE DKEELKKRLP AVKSEGKRKA DEVDGGVSKK QKKEDEKLEQ NLKDQSQLIW
250 260 270 280 290 300
GIKDKLKKFC SINDMKELLI ANSQEVPSGE SNIVDRLSDC MAFGSLKPCE TCKGQLVFKS
310 320 330 340 350 360
DAYYCTGDIS AWTKCVFKTQ TPDRKDWVTP KEFSEIPFLK KFKFKRQDRV FPKDAPPAAA
370 380 390 400 410 420
TPSSGSTTSA ATSVSSASKN LTEAPADKPL TGMKLLAVGK LSKNKDDLKK FVEDLGGKIT
430 440 450 460 470 480
GTASKAALCI SSKKEIEKMS KKMEEVRDAG VRVVADDFLT DIKESGKALQ ELISLHAISP
490 500 510 520 530 540
WGAEVKVEAP AAAAATKSTG AHSSKSTGKV KEEEGGSKSK KMKLTVKGGA AVDPDSGLEN
550 560 570 580 590 600
CAHVLEQNGK IYSATLGLVD IVRGTNSYYK LQLLEDDVQK RYWVFRSWGR VGTTIGGNKL
610 620 630 640 650 660
DKFYDKNSAM DNFCGVYEEK TGNAWASSNF TKYPNKFYPL EIDYGQDEEA VKKLTQSAGA
670 680 690 700 710 720
KSQLEKPVQD LIRMIFDVES MKKAMVEFEI DLQKMPLGKL SKRQIQSAYS LLSEVQQAVA
730 740 750 760 770 780
DSSSESLILD LSNRFYTLIP HDFGMKKPPL LSNVDYIQQK VQMLDNLLDI EVAYSLLRGG
790 800 810 820 830 840
VENNEKDPID INYEKLKTKI EVVDKSSHEA QLILQYVKNT HAATHNTYTL DVEEIFKIER
850 860 870 880 890 900
EGEYQRYRPF KELPNRQLLW HGSRTTNYAG ILSQGLRIAP PEAPVTGYMF GKGVYFADMV
910 920 930 940 950 960
SKSANYCHTS QADPVGLILL GEVALGNMHE LKKASHITKL PKGKHSVKGL GRSAPDPRAT
970 980 990 1000 1010
VSLNGVDIPL GKGMNTNIDD TSLLYNEYIV YDVSQVNLKY LLKIRFNYQT SLW