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)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth T]	5_3_exonuc	e1bgxT1	A: alpha arrays	X: HhH/H2TH	H: SAM/DNA-glycosylase	T: SAM domain-like	F: 5_3_exonuc	ECOD (1.6)
A [auth T]	DNA_pol_A_2nd	e1bgxT9	A: alpha arrays	X: helical bundle in Bacillus stearothermophilus-like DNA polymerase I (From Topology)	H: helical bundle in Bacillus stearothermophilus-like DNA polymerase I (From Topology)	T: helical bundle in Bacillus stearothermophilus-like DNA polymerase I	F: DNA_pol_A_2nd	ECOD (1.6)
A [auth T]	DNA_pol_A_1st	e1bgxT3	A: alpha bundles	X: fingers domain in bacteriophage RB69-like DNA polymerase I (From Topology)	H: fingers domain in bacteriophage RB69-like DNA polymerase I (From Topology)	T: fingers domain in bacteriophage RB69-like DNA polymerase I	F: DNA_pol_A_1st	ECOD (1.6)
A [auth T]	DNA_pol_A_3rd	e1bgxT10	A: a+b two layers	X: Alpha-beta plaits	H: Adenylyl and guanylyl cyclase catalytic domain-like	T: Adenylyl and guanylyl cyclase catalytic domain-like	F: DNA_pol_A_3rd	ECOD (1.6)
A [auth T]	5_3_exonuc_N	e1bgxT4	A: a/b three-layered sandwiches	X: HAD domain-like	H: HAD domain-related	T: PIN domain-like	F: 5_3_exonuc_N	ECOD (1.6)
A [auth T]	Taq-exonuc	e1bgxT8	A: mixed a+b and a/b	X: Ribonuclease H-like	H: Ribonuclease H-like (From Topology)	T: Ribonuclease H-like	F: Taq-exonuc	ECOD (1.6)
B [auth L]	C1-set_4	e1bgxL2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_4	ECOD (1.6)
B [auth L]	V-set	e1bgxL1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
C [auth H]	C1-set_1	e1bgxH3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_1	ECOD (1.6)
C [auth H]	V-set_12	e1bgxH4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_12	ECOD (1.6)

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 (202510-0)
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 (202510-0)

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 (2025-03-21)
C [auth H]	Heavy Chain	IGHV3	-	taq dna polymerase	SAbDab (2025-03-21)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth T]	PF02739	5'-3' exonuclease, N-terminal resolvase-like domain (5_3_exonuc_N)	5'-3' exonuclease, N-terminal resolvase-like domain		Domain
A [auth T]	PF09281	Taq polymerase, exonuclease (Taq-exonuc)	Taq polymerase, exonuclease	Members of this family are found in prokaryotic Taq DNA polymerase, where they assume a ribonuclease H-like motif. The domain confers 5'-3' exonuclease activity to the polymerase [1].	Domain
A [auth T]	PF01367	5'-3' exonuclease, C-terminal SAM fold (5_3_exonuc)	5'-3' exonuclease, C-terminal SAM fold		Domain
A [auth T]	PF00476	DNA polymerase family A (DNA_pol_A)	DNA polymerase family A	-	Family

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 nuclease activity hydrolase activity, acting on ester bonds 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.