Annotations: 8U3S

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Nudix	8086556	3000098	SCOP2B (2022-06-29)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B	Heavy Chain	IGHV3	-	tudor-interacting repair regulator protein	SAbDab (2025-12-19)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF22327	U8 snoRNA-decapping enzyme-like (Nudt16-like)	U8 snoRNA-decapping enzyme-like	This entry represents the NUDIX hydrolase domain of U8 snoRNA -decapping enzyme from Xenopus laevis (Nudt16) and similar proteins from animals and bacteria. Nudt16 was initially described as an RNA-binding and decapping enzyme but it was later report ...	This entry represents the NUDIX hydrolase domain of U8 snoRNA -decapping enzyme from Xenopus laevis (Nudt16) and similar proteins from animals and bacteria. Nudt16 was initially described as an RNA-binding and decapping enzyme but it was later reported to be specialised in the removal of hazardous (deoxy)inosine diphosphate from the nucleotide pool. It adopts a canonical NUDIX fold, an alpha-beta-alpha sandwich constituted by two beta-sheets whose strands interact in a way that could also be described as a single extended beta-sheet [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	Nanobody	-	-	-
A	Tudor-interacting repair regulator protein	RNA binding binding snoRNA binding nucleic acid binding	cellular response to stimulus regulation of cellular process regulation of double-strand break repair response to stimulus regulation of cellular response to stress negative regulation of biological process negative regulation of double-strand break repair via nonhomologous end joining regulation of primary metabolic process nucleobase-containing compound metabolic process negative regulation of DNA repair cellular response to stress response to stress regulation of response to stress negative regulation of double-strand break repair negative regulation of cellular process cellular response to stimulus regulation of cellular process regulation of double-strand break repair response to stimulus regulation of cellular response to stress negative regulation of biological process negative regulation of double-strand break repair via nonhomologous end joining regulation of primary metabolic process nucleobase-containing compound metabolic process negative regulation of DNA repair cellular response to stress response to stress regulation of response to stress negative regulation of double-strand break repair negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of double-strand break repair via nonhomologous end joining DNA repair negative regulation of macromolecule metabolic process double-strand break repair regulation of biological process double-strand break repair via nonhomologous end joining negative regulation of response to stimulus negative regulation of metabolic process biological regulation primary metabolic process DNA metabolic process regulation of macromolecule metabolic process nucleic acid metabolic process regulation of DNA repair DNA damage response regulation of response to stimulus metabolic process cellular process negative regulation of DNA metabolic process macromolecule metabolic process regulation of metabolic process regulation of DNA metabolic process	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR054754	U8 snoRNA-decapping enzyme NudT16	Family
A	IPR015797	NUDIX hydrolase-like domain superfamily	Homologous Superfamily

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.