5K5D | pdb_00005k5d

Structure of the C2221 form of Pnob8-like ParB-N domain

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family 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 [auth B]	EUF07886	e5k5dB1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: EUF07886	ECOD (1.6)
A [auth B]	EUF07976	e5k5dB3	A: alpha arrays	X: KorB C-terminal domain-like	H: KorB C-terminal domain (From Topology)	T: KorB C-terminal domain	F: EUF07976	ECOD (1.6)
A [auth B]	ParBc	e5k5dB2	A: a+b complex topology	X: ParB/Sulfiredoxin (From Topology)	H: ParB/Sulfiredoxin (From Topology)	T: ParB/Sulfiredoxin	F: ParBc	ECOD (1.6)
B [auth A]	EUF07886	e5k5dA2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: EUF07886	ECOD (1.6)
B [auth A]	EUF07976	e5k5dA1	A: alpha arrays	X: KorB C-terminal domain-like	H: KorB C-terminal domain (From Topology)	T: KorB C-terminal domain	F: EUF07976	ECOD (1.6)
B [auth A]	ParBc	e5k5dA3	A: a+b complex topology	X: ParB/Sulfiredoxin (From Topology)	H: ParB/Sulfiredoxin (From Topology)	T: ParB/Sulfiredoxin	F: ParBc	ECOD (1.6)
C	EUF07886	e5k5dC2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: EUF07886	ECOD (1.6)
C	EUF07976	e5k5dC1	A: alpha arrays	X: KorB C-terminal domain-like	H: KorB C-terminal domain (From Topology)	T: KorB C-terminal domain	F: EUF07976	ECOD (1.6)
C	ParBc	e5k5dC3	A: a+b complex topology	X: ParB/Sulfiredoxin (From Topology)	H: ParB/Sulfiredoxin (From Topology)	T: ParB/Sulfiredoxin	F: ParBc	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A], C	PF22445	Ssol_1539-like, second domain (Ssol_1539-like_2nd)	Ssol_1539-like, second domain	This domain is found in Ssol_1539 from Saccharolobus solfataricus and similar archaeal sequences. Ssol_1539 is organised into two domains. The N-terminal domain contains two subdomains separated by a central helix. This entry represents the second su ...	This domain is found in Ssol_1539 from Saccharolobus solfataricus and similar archaeal sequences. Ssol_1539 is organised into two domains. The N-terminal domain contains two subdomains separated by a central helix. This entry represents the second subdomain, which shows an all-alpha configuration [1].	Domain
A [auth B], B [auth A], C	PF02195	ParB N-terminal domain (ParB_N)	ParB N-terminal domain	This entry describes the N-terminal domain of ParB proteins, predominantly found in bacteria. This domain is characterised by a highly conserved arginine motif, RRXR, known as the arginine patch, which is crucial for ParB DNA binding activity [1-2]. ...	This entry describes the N-terminal domain of ParB proteins, predominantly found in bacteria. This domain is characterised by a highly conserved arginine motif, RRXR, known as the arginine patch, which is crucial for ParB DNA binding activity [1-2]. ParB plays a vital role in chromosome partitioning and nucleoid occlusion. These proteins are essential for ensuring proper chromosome segregation during cell division by binding to the DNA origin of replication and localising to both poles of the predivisional cell following DNA replication. ParB comprises three highly conserved domains: an N-terminal nucleotide-binding domain (NBD), a central helix-turn-helix (HTH) parS-binding domain, a non-structured linker region, and a C-terminal dimerisation domain that tightly links the two subunits of the ParB dimer [3]. ParB proteins share significant sequence and structural similarity with Sulfiredoxin (Srx), a sulfinic acid reductase identified in eukaryotes. Sequence comparison and phylogenetic analysis of the Srx and ParB protein families suggest that Srx evolved via truncation of ParB, resulting in the removal of the entire C-terminal half of the protein including the HTH domain [4].	Domain

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A], C	IPR054524	Ssol_1539-like, N-teminal, second subdomain	Domain
A [auth B], B [auth A], C	IPR036086	ParB/Sulfiredoxin superfamily	Homologous Superfamily
A [auth B], B [auth A], C	IPR003115	ParB-like, N-terminal domain	Domain

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.