Annotations: 8PIJ

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	DNA_topoisoIV	e8pijA1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: DNA_topoisoIV	ECOD (v295.2)
B	REC lobe of CRISPR-associated endonuclease Cas9 / Bridge helix of CRISPR-associated endonuclease Cas9	e8pijB01	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: REC lobe of CRISPR-associated endonuclease Cas9 / Bridge helix of CRISPR-associated endonuclease Cas9	ECOD (v295.2)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B	Heavy Chain	IGHV1	-	pilin	SAbDab (2026-09-11)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Pilin	-	cell adhesion cellular process	pilus cell projection cellular anatomical structure
B	C24 nanobody	-	-	-

Chains	Accession	Name	Type
A	IPR012902	Prokaryotic N-terminal methylation site	PTM
A	IPR001082	Fimbrial protein pilin	Family
A	IPR045584	Pilin-like	Homologous Superfamily

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

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.

8PIJ | pdb_00008pij