1JO0

Structure of HI1333, a Hypothetical Protein from Haemophilus influenzae with Structural Similarity to RNA-binding Proteins

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1jo0a_	Alpha and beta proteins (a+b)	IF3-like	YhbY-like	YhbY-like	YhbY homologue HI1333	(Haemophilus influenzae ) [TaxId: 727 ],	SCOPe (2.08)
B	d1jo0b_	Alpha and beta proteins (a+b)	IF3-like	YhbY-like	YhbY-like	YhbY homologue HI1333	(Haemophilus influenzae ) [TaxId: 727 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	YhbY-like	8030272	4002698	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	YhbY-like	8042651	3001623	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	YhbY-like	8042651	3001623	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	CRS1_YhbY	e1jo0A1	A: a+b two layers	X: IF3-like	H: YhbY-like (From Topology)	T: YhbY-like	F: CRS1_YhbY	ECOD (1.6)
B	CRS1_YhbY	e1jo0B1	A: a+b two layers	X: IF3-like	H: YhbY-like (From Topology)	T: YhbY-like	F: CRS1_YhbY	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.110.60	Alpha Beta	2-Layer Sandwich	Translation Initiation Factor IF3	YhbY-like	CATH (4.3.0)
B	3.30.110.60	Alpha Beta	2-Layer Sandwich	Translation Initiation Factor IF3	YhbY-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01985	CRS1 / YhbY (CRM) domain (CRS1_YhbY)	CRS1 / YhbY (CRM) domain	Escherichia coli YhbY is associated with pre-50S ribosomal subunits, which implies a function in ribosome assembly. GFP fused to a single-domain CRM protein from maize localises to the nucleolus, suggesting that an analogous activity may have been r ...	Escherichia coli YhbY is associated with pre-50S ribosomal subunits, which implies a function in ribosome assembly. GFP fused to a single-domain CRM protein from maize localises to the nucleolus, suggesting that an analogous activity may have been retained in plants [4]. A CRM domain containing protein in plant chloroplasts has been shown to function in group I and II intron splicing [5]. In vitro experiments with an isolated maize CRM domain have shown it to have RNA binding activity. These and other results suggest that the CRM domain evolved in the context of ribosome function prior to the divergence of Archaea and Bacteria, that this function has been maintained in extant prokaryotes, and that the domain was recruited to serve as an RNA binding module during the evolution of plant genomes [4]. YhbY has a fold similar to that of the C-terminal domain of translation initiation factor 3 (IF3C), which binds to 16S rRNA in the 30S ribosome [1][2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	HYPOTHETICAL PROTEIN HI1333	RNA binding binding nucleic acid binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR051925	RNA-binding domain-containing protein	Family
A, B	IPR001890	RNA-binding, CRM domain	Domain
A, B	IPR035920	YhbY-like superfamily	Homologous Superfamily
A, B	IPR017924	RNA-binding protein YhbY	Family

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.