Annotations: 1BGX

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A [auth T]	d1bgxt1	All alpha proteins	SAM domain-like	5' to 3' exonuclease, C-terminal subdomain	5' to 3' exonuclease, C-terminal subdomain	5' to 3' exonuclease domain of DNA polymerase Taq	(Thermus aquaticus ) [TaxId: 271 ],	SCOPe (2.08)
A [auth T]	d1bgxt3	Alpha and beta proteins (a/b)	Ribonuclease H-like motif	Ribonuclease H-like	DnaQ-like 3'-5' exonuclease	Exonuclease domain of prokaryotic DNA polymerase	(Thermus aquaticus ) [TaxId: 271 ],	SCOPe (2.08)
A [auth T]	d1bgxt2	Alpha and beta proteins (a/b)	PIN domain-like	PIN domain-like	5' to 3' exonuclease catalytic domain	5' to 3' exonuclease domain of DNA polymerase Taq	(Thermus aquaticus ) [TaxId: 271 ],	SCOPe (2.08)
A [auth T]	d1bgxt4	Multi-domain proteins (alpha and beta)	DNA/RNA polymerases	DNA/RNA polymerases	DNA polymerase I	DNA polymerase I (Klenow fragment)	(Thermus aquaticus ) [TaxId: 271 ],	SCOPe (2.08)
B [auth L]	d1bgxl1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin light chain kappa variable domain, VL-kappa	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B [auth L]	d1bgxl2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin light chain kappa constant domain, CL-kappa	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C [auth H]	d1bgxh1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin heavy chain variable domain, VH	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C [auth H]	d1bgxh2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain gamma constant domain 1, CH1-gamma	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth T]	SCOP2 Family	5' to 3' exonuclease, C-terminal subdomain	8025356	4001035	SCOP2 (2022-06-29)
A [auth T]	SCOP2 Family	FEN1 catalytic domain-like	8032080	4000504	SCOP2 (2022-06-29)
A [auth T]	SCOP2 Superfamily	5' to 3' exonuclease, C-terminal subdomain	8037735	3000537	SCOP2 (2022-06-29)
A [auth T]	SCOP2 Superfamily	PIN domain-like	8044458	3001041	SCOP2 (2022-06-29)
A [auth T]	SCOP2B Superfamily	Nucleotide cyclase/DNA polymerase palm domain-like	8037492	3001272	SCOP2B (2022-06-29)
A [auth T]	SCOP2B Superfamily	Ribonuclease H-like	8044539	3000143	SCOP2B (2022-06-29)
A [auth T]	SCOP2B Superfamily	Nucleotide cyclase/DNA polymerase palm domain-like	8037492	3001272	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth T]		e1bgxT3	A: a/b three-layered sandwiches	X: ETN0001 domain-like	H: Flavivirus capsid protein C	T: Flavivirus capsid protein C	F:	ECOD (v294.1)
A [auth T]	Piwi	e1bgxT8	A: a/b three-layered sandwiches	X: DEATH domain	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F: Piwi	ECOD (v294.1)
A [auth T]	Aldedh	e1bgxT1	A: a/b three-layered sandwiches	X: HAD domain-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: Aldedh	ECOD (v294.1)
B [auth L]	Copper-bind	e1bgxL1	A: a/b three-layered sandwiches	X: Phage tail fiber protein trimerization domain	H: beta-Prism I	T: beta-Prism I	F: Copper-bind	ECOD (v294.1)
C [auth H]	ig	e1bgxH3	A: a/b three-layered sandwiches	X: Fusion glycoprotein F2	H: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	T: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	F: ig	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth T]	3.40.50.1010	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	5'-nuclease	CATH (4.3.0)
A [auth T]	1.10.150.20	Mainly Alpha	Orthogonal Bundle	DNA polymerase	domain 1	CATH (4.3.0)
A [auth T]	3.30.420.10	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
A [auth T]	1.20.1060.10	Mainly Alpha	Up-down Bundle	Taq DNA Polymerase	Chain T, domain 4	CATH (4.3.0)
A [auth T]	3.30.70.370	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
B [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
B [auth L]	Tp7	L-KAPPA	Mus musculus (house mouse)	IGKV4-5501, IGKJ501, IGKC01, IGKC02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-2A_KAPPA	IMGT (202613-0)
C [auth H]	Tp7	VH-CH1	Mus musculus (house mouse)	IGHV3-202, IGHJ101, IGHJ102, IGHJ103, IGHG2A01, IGHG2A02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-2A_KAPPA	IMGT (202613-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L]	Light Chain	IGKV4	Kappa	taq dna polymerase	SAbDab (2026-04-10)
C [auth H]	Heavy Chain	IGHV3	-	taq dna polymerase	SAbDab (2026-04-10)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth T]	TAQ DNA POLYMERASE	catalytic activity, acting on DNA DNA-directed DNA polymerase activity DNA polymerase activity catalytic activity, acting on a nucleic acid transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups DNA binding binding nucleic acid binding nucleoside binding heterocyclic compound binding carbohydrate derivative binding catalytic activity, acting on DNA DNA-directed DNA polymerase activity DNA polymerase activity catalytic activity, acting on a nucleic acid transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups DNA binding binding nucleic acid binding nucleoside binding heterocyclic compound binding carbohydrate derivative binding small molecule binding hydrolase activity, acting on ester bonds nuclease activity 5'-3' exonuclease activity hydrolase activity exonuclease activity	nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication metabolic process cellular process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process cellular response to stimulus double-strand break repair response to stimulus cellular response to stress DNA damage response nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication metabolic process cellular process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process cellular response to stimulus double-strand break repair response to stimulus cellular response to stress DNA damage response response to stress DNA repair	-
B [auth L]	TP7 MAB	-	-	-
C [auth H]	TP7 MAB	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth T]	IPR036397	Ribonuclease H superfamily	Homologous Superfamily
A [auth T]	IPR002421	5'-3' exonuclease	Domain
A [auth T]	IPR043502	DNA/RNA polymerase superfamily	Homologous Superfamily
A [auth T]	IPR020045	DNA polymerase I-like, H3TH domain	Domain
A [auth T]	IPR015361	Taq polymerase, thermostable, exonuclease region	Domain
A [auth T]	IPR001098	DNA-directed DNA polymerase, family A, palm domain	Domain
A [auth T]	IPR029060	PIN-like domain superfamily	Homologous Superfamily
A [auth T]	IPR036279	5'-3' exonuclease, C-terminal domain superfamily	Homologous Superfamily
A [auth T]	IPR008918	Helix-hairpin-helix motif, class 2	Conserved Site
A [auth T]	IPR002298	DNA polymerase A	Family
A [auth T]	IPR020046	5'-3' exonuclease, alpha-helical arch, N-terminal	Domain
A [auth T]	IPR019760	DNA-directed DNA polymerase, family A, conserved site	Conserved Site
A [auth T]	IPR018320	DNA polymerase 1	Family
A [auth T]	IPR003583	Helix-hairpin-helix DNA-binding motif, class 1	Domain
A [auth T]	IPR012337	Ribonuclease H-like superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.