Annotations: 7KBB

Cryo-EM structure of the HCMV pentamer bound by Fabs 2-18 and 8I21

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	LbH_EIF2B	e7kbbA1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: RIFT-related	T: FMN-binding split barrel 2	F: LbH_EIF2B	ECOD (v294.1)
B	LbH_EIF2B	e7kbbB1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: RIFT-related	T: FMN-binding split barrel 2	F: LbH_EIF2B	ECOD (v294.1)
D	RNase_H	e7kbbD1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: RNase_H	ECOD (v294.1)
F [auth H]	RNase_H	e7kbbH1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: RNase_H	ECOD (v294.1)
G [auth L]	RNase_H	e7kbbL1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: RNase_H	ECOD (v294.1)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A	Heavy Chain	IGHV3	-	ul131a \| envelope protein ul128	SAbDab (2026-04-24)
B	Light Chain	IGKV1	Kappa	ul131a \| envelope protein ul128	SAbDab (2026-04-24)
F [auth H]	Heavy Chain	IGHV3	-	envelope glycoprotein ul130	SAbDab (2026-04-24)
G [auth L]	Light Chain	IGKV3	Kappa	envelope glycoprotein ul130	SAbDab (2026-04-24)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
D	PF11668	HCMV glycoprotein pUL130 (Gp_UL130)	HCMV glycoprotein pUL130	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	2-18 Fab Heavy Chain	-	-	-
B	2-18 Fab Light Chain	-	-	-
C	Envelope protein UL128	-	virion attachment to host cell biological process involved in interspecies interaction between organisms receptor-mediated virion attachment to host cell adhesion of symbiont to host cell entry receptor-mediated virion attachment to host cell viral process viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction symbiont entry into host cell symbiont entry into host	virion component virion membrane
D	Envelope glycoprotein UL130	-	virion attachment to host cell biological process involved in interspecies interaction between organisms receptor-mediated virion attachment to host cell adhesion of symbiont to host cell entry receptor-mediated virion attachment to host cell viral process viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction symbiont entry into host cell symbiont entry into host	virion component virion membrane
E	UL131A	-	virion attachment to host cell biological process involved in interspecies interaction between organisms receptor-mediated virion attachment to host cell adhesion of symbiont to host cell entry receptor-mediated virion attachment to host cell viral process viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction symbiont entry into host cell symbiont entry into host	virion component viral membrane viral envelope virion membrane
F [auth H]	8I21 Fab Heavy Chain	-	-	-
G [auth L]	8I21 Fab Light Chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C	IPR057762	UL128-like, Cytomegalovirus	Family
D	IPR021038	Herpesvirus UL130, cytomegalovirus	Family

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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.