Annotations: 9G9M

Lipid III flippase WzxE with NB10 and NB7 nanobodies in outward-facing conformation - crystal 1

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C		e9g9mC01	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F:	ECOD (v295.2)
B	Beta-Casp	e9g9mB1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Beta-Casp	ECOD (v295.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C	Heavy Chain	IGHV1	-	lipid iii flippase	SAbDab (2026-08-21)
B	Heavy Chain	IGHV1	-	lipid iii flippase	SAbDab (2026-08-21)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01943	Polysaccharide biosynthesis protein (Polysacc_synt)	Polysaccharide biosynthesis protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C	NB7 Nanobody	-	-	-
B	NB10 Nanobody	-	-	-
A	Lipid III flippase	lipid carrier activity transporter activity intramembrane lipid carrier activity molecular carrier activity	carbohydrate derivative biosynthetic process carbohydrate metabolic process polysaccharide biosynthetic process carbohydrate biosynthetic process enterobacterial common antigen biosynthetic process carbohydrate derivative metabolic process primary metabolic process macromolecule biosynthetic process polysaccharide metabolic process biosynthetic process enterobacterial common antigen metabolic process metabolic process cellular process macromolecule metabolic process	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR032896	Lipid III flippase WzxE, Proteobacteria	Family
A	IPR050833	Polysaccharide Biosynthesis and Transport	Family
A	IPR002797	Polysaccharide biosynthesis protein	Family
A	IPR044550	Lipid III flippase WzxE	Family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Chain Length Determinant and Associated Proteins	WzxE lipid III flippase in complex with nanobody Nb10, outward-facing conformation, native-SAD structure determined at wavelength 2.7552 Å

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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.