1B2M

THREE-DIMENSIONAL STRUCTURE OF RIBONULCEASE T1 COMPLEXED WITH AN ISOSTERIC PHOSPHONATE ANALOGUE OF GPU: ALTERNATE SUBSTRATE BINDING MODES AND CATALYSIS.

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
Structure Motif: Primary M-CSA Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
D [auth A]	d1b2ma_	Alpha and beta proteins (a+b)	Microbial ribonucleases	Microbial ribonucleases	Fungal ribonucleases	RNase T1	(Aspergillus oryzae ) [TaxId: 5062 ],	SCOPe (2.08)
E [auth B]	d1b2mb_	Alpha and beta proteins (a+b)	Microbial ribonucleases	Microbial ribonucleases	Fungal ribonucleases	RNase T1	(Aspergillus oryzae ) [TaxId: 5062 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D [auth A]	SCOP2B Superfamily	Microbial ribonucleases	8033542	3001847	SCOP2B (2022-06-29)
E [auth B]	SCOP2B Superfamily	Microbial ribonucleases	8033542	3001847	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)
D [auth A]	Ribonuclease	e1b2mA1	A: a+b two layers	X: Microbial ribonucleases-like	H: Microbial ribonucleases (From Topology)	T: Microbial ribonucleases	F: Ribonuclease	ECOD (1.6)
E [auth B]	Ribonuclease	e1b2mB1	A: a+b two layers	X: Microbial ribonucleases-like	H: Microbial ribonucleases (From Topology)	T: Microbial ribonucleases	F: Ribonuclease	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D [auth A]	3.10.450.30	Alpha Beta	Roll	Nuclear Transport Factor 2	Chain: A,	CATH (4.3.0)
E [auth B]	3.10.450.30	Alpha Beta	Roll	Nuclear Transport Factor 2	Chain: A,	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
D [auth A], E [auth B]	PF00545	ribonuclease (Ribonuclease)	ribonuclease	This enzyme hydrolyses RNA and oligoribonucleotides.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth C], B [auth D], C [auth E]	5'-R(GP(U34))-3'	-	-	-
D [auth A], E [auth B]	RIBONUCLEASE T1	endonuclease activity nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on RNA RNA endonuclease activity catalytic activity, acting on a nucleic acid RNA nuclease activity hydrolase activity catalytic activity ribonuclease T1 activity lyase activity RNA binding binding nucleic acid binding	-	cellular anatomical structure cell tip cell pole hyphal tip site of polarized growth cell septum

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
D [auth A], E [auth B]	IPR000026	Guanine-specific ribonuclease N1-like	Family
D [auth A], E [auth B]	IPR051386	Guanyl-specific ribonuclease N1/T1	Family
D [auth A], E [auth B]	IPR016191	Ribonuclease/ribotoxin	Homologous Superfamily
D [auth A], E [auth B]	IPR048269	Ribonuclease ribotoxin, alpha-sarcin type	Family

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
D [auth A]	ribonuclease T1 M-CSA #414	Ribonuclease T1 is an extracellular enzyme from Aspergillus oryzae that catalyses the hydrolysis of RNA at guanylyl residues yielding new guanosine 3'-phosphate and 5'-OH ends. It enhances the rate of GpC cleavage by about 10^11-fold. This stable, low molecular weight, monomeric endonuclease is the leading representative of a family of related fungal/bacterial proteins that share sequence and three-dimensional structural similarities.	Defined by 6 residues: TYR:D-38 [auth A-38]HIS:D-40 [auth A-40]GLU:D-58 [auth A-58]ARG:D-77 [auth A-77]HIS:D-92 [auth A-92]PHE:D-100 [auth A-100] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.1.27.3 (PDB Primary Data) Search M-CSA Motif + EC 3.1.27.3 EC: 4.6.1.24 (UniProt) Search M-CSA Motif + EC 4.6.1.24

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.