Annotations: 3D1B

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	F_UNCLASSIFIED	e3d1bA1	A: alpha arrays	X: RuvA-C	H: Tas3 C-terminal helical domains (From Topology)	T: Tas3 C-terminal helical domains	F: F_UNCLASSIFIED	ECOD (1.6)
A	PF21487	e3d1bA2	A: alpha arrays	X: RuvA-C	H: Tas3 C-terminal helical domains (From Topology)	T: Tas3 C-terminal helical domains	F: PF21487	ECOD (1.6)
B	F_UNCLASSIFIED	e3d1bB1	A: alpha arrays	X: RuvA-C	H: Tas3 C-terminal helical domains (From Topology)	T: Tas3 C-terminal helical domains	F: F_UNCLASSIFIED	ECOD (1.6)
B	PF21487	e3d1bB2	A: alpha arrays	X: RuvA-C	H: Tas3 C-terminal helical domains (From Topology)	T: Tas3 C-terminal helical domains	F: PF21487	ECOD (1.6)
C	F_UNCLASSIFIED	e3d1bC1	A: alpha arrays	X: RuvA-C	H: Tas3 C-terminal helical domains (From Topology)	T: Tas3 C-terminal helical domains	F: F_UNCLASSIFIED	ECOD (1.6)
C	PF21487	e3d1bC2	A: alpha arrays	X: RuvA-C	H: Tas3 C-terminal helical domains (From Topology)	T: Tas3 C-terminal helical domains	F: PF21487	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.920.40	Mainly Alpha	Up-down Bundle	Histone Acetyltransferase	Chain A	CATH (4.3.0)
B	1.20.920.40	Mainly Alpha	Up-down Bundle	Histone Acetyltransferase	Chain A	CATH (4.3.0)
C	1.20.920.40	Mainly Alpha	Up-down Bundle	Histone Acetyltransferase	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF21487	Tas3, C-terminal helical domains (Tas3_C-hel)	Tas3, C-terminal helical domains	RNA-induced transcriptional silencing complex protein tas3 (Tas3) plays a role in the RNA interference (RNAi) pathway which is important for heterochromatin formation and accurate chromosome segregation. It is part of the RNA-induced transcriptional ...	RNA-induced transcriptional silencing complex protein tas3 (Tas3) plays a role in the RNA interference (RNAi) pathway which is important for heterochromatin formation and accurate chromosome segregation. It is part of the RNA-induced transcriptional silencing (RITS) complex which provides a physical tether between the RNAi and heterochromatin assembly pathways [1]. This entry represents the C-terminal alpha-helical domain which self-associates into a helical polymer and is required for cis spreading of RITS in centromeric DNA regions [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	RNA-induced transcriptional silencing complex protein tas3	molecular adaptor activity	regulation of cellular process cellular biosynthetic process negative regulation of biological process negative regulation of cellular metabolic process protein-DNA complex organization cellular component organization organic substance metabolic process chromatin organization organic substance biosynthetic process negative regulation of cellular process chromatin remodeling cellular component organization or biogenesis negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of cellular process cellular biosynthetic process negative regulation of biological process negative regulation of cellular metabolic process protein-DNA complex organization cellular component organization organic substance metabolic process chromatin organization organic substance biosynthetic process negative regulation of cellular process chromatin remodeling cellular component organization or biogenesis negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of biological process heterochromatin formation protein-containing complex organization epigenetic regulation of gene expression cellular metabolic process negative regulation of metabolic process biological regulation regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process negative regulation of cellular biosynthetic process regulation of cellular biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of gene expression, epigenetic regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process regulation of metabolic process cell cycle chromosome segregation cell cycle process siRNA-mediated heterochromatin formation siRNA-mediated pericentric heterochromatin formation regulatory ncRNA-mediated gene silencing pericentric heterochromatin formation constitutive heterochromatin formation regulatory ncRNA-mediated heterochromatin formation silent mating-type cassette heterochromatin formation	intracellular organelle microtubule organizing center intracellular anatomical structure cytoskeleton organelle intracellular non-membrane-bounded organelle spindle pole body cellular anatomical entity microtubule cytoskeleton non-membrane-bounded organelle membrane-bounded organelle protein-containing complex nucleus membrane-enclosed lumen intracellular organelle microtubule organizing center intracellular anatomical structure cytoskeleton organelle intracellular non-membrane-bounded organelle spindle pole body cellular anatomical entity microtubule cytoskeleton non-membrane-bounded organelle membrane-bounded organelle protein-containing complex nucleus membrane-enclosed lumen nuclear protein-containing complex nuclear chromosome chromosome heterochromatin RNAi effector complex intracellular organelle lumen RITS complex protein-DNA complex chromatin intracellular membrane-bounded organelle organelle lumen ribonucleoprotein complex nuclear lumen mating-type region heterochromatin cytoplasm chromosome, subtelomeric region chromosome, telomeric region chromosomal region pericentric heterochromatin chromosome, centromeric region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR049112	Tas3, C-terminal helical 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 R01GM133198.