Annotations: 3M9Q

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3m9qa_	All beta proteins	SH3-like barrel	Chromo domain-like	automated matches	automated matches	Fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)
B	d3m9qb_	All beta proteins	SH3-like barrel	Chromo domain-like	automated matches	automated matches	Fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Chromo barrel domain	8098725	4003139	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Chromo domain-like	8098726	3000161	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Chromo domain-like	8098726	3000161	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	Tudor-knot_1	e3m9qA1	A: beta barrels	X: SH3	H: Chromo domain-like (From Topology)	T: Chromo domain-like	F: Tudor-knot_1	ECOD (1.6)
B	Tudor-knot_1	e3m9qB1	A: beta barrels	X: SH3	H: Chromo domain-like (From Topology)	T: Chromo domain-like	F: Tudor-knot_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
A	1.20.5.220	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
B	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF22732	MSL3 chromodomain-like (MSL3_chromo-like)	MSL3 chromodomain-like	This domain is found in Male-specific lethal-3 (MSL3) and other related proteins such as MRG15 transcription factor. MSL3 resides in the MSL (male-specific lethal) complex, which upregulates transcription by spreading the histone H4 Lys16 acetyl mark ...	This domain is found in Male-specific lethal-3 (MSL3) and other related proteins such as MRG15 transcription factor. MSL3 resides in the MSL (male-specific lethal) complex, which upregulates transcription by spreading the histone H4 Lys16 acetyl mark. The MSL3 chromo domain implicated in chromatin targeting and its deletion leads to the disruption of MSL targeting. The MRG15 chromo domain is involved in chromatin remodelling and transcription regulation. This domain consists of a SH3-like beta-barrel and a long alpha-helix.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Protein male-specific lethal-3	RNA binding binding organic cyclic compound binding lncRNA binding nucleic acid binding histone reader activity chromatin-protein adaptor activity protein-macromolecule adaptor activity molecular adaptor activity protein-containing complex binding chromatin binding methylated histone binding protein binding modification-dependent protein binding RNA binding binding organic cyclic compound binding lncRNA binding nucleic acid binding histone reader activity chromatin-protein adaptor activity protein-macromolecule adaptor activity molecular adaptor activity protein-containing complex binding chromatin binding methylated histone binding protein binding modification-dependent protein binding histone binding methylation-dependent protein binding	regulation of cellular process cellular biosynthetic process protein-DNA complex organization cellular component organization chromatin organization chromatin remodeling cellular component organization or biogenesis regulation of biosynthetic process regulation of biological process protein-containing complex organization sex-chromosome dosage compensation epigenetic regulation of gene expression cellular metabolic process biological regulation regulation of cellular process cellular biosynthetic process protein-DNA complex organization cellular component organization chromatin organization chromatin remodeling cellular component organization or biogenesis regulation of biosynthetic process regulation of biological process protein-containing complex organization sex-chromosome dosage compensation epigenetic regulation of gene expression cellular metabolic process biological regulation regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process dosage compensation by hyperactivation of X chromosome cellular process regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process primary metabolic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process regulation of DNA-templated transcription developmental process sexual reproduction cellular developmental process reproductive process multicellular organismal reproductive process cell development cellular process involved in reproduction in multicellular organism developmental process involved in reproduction gamete generation cell differentiation anatomical structure development germ cell development multicellular organismal process cell population proliferation regulation of developmental process regulation of hemocyte proliferation immune system process regulation of cell population proliferation regulation of multicellular organismal process regulation of immune system process hemocyte proliferation oogenesis female gamete generation oocyte development oocyte differentiation	intracellular organelle intracellular anatomical structure organelle intracellular non-membrane-bounded organelle polytene chromosome chromosome cellular anatomical entity non-membrane-bounded organelle protein-containing complex catalytic complex protein-DNA complex chromatin transferase complex histone acetyltransferase complex intracellular organelle intracellular anatomical structure organelle intracellular non-membrane-bounded organelle polytene chromosome chromosome cellular anatomical entity non-membrane-bounded organelle protein-containing complex catalytic complex protein-DNA complex chromatin transferase complex histone acetyltransferase complex MSL complex acetyltransferase complex H4 histone acetyltransferase complex protein acetyltransferase complex intracellular protein-containing complex NuA4 histone acetyltransferase complex H4/H2A histone acetyltransferase complex sex chromosome X chromosome membrane-bounded organelle nucleus membrane-enclosed lumen nuclear chromosome intracellular membrane-bounded organelle intracellular organelle lumen organelle lumen nuclear lumen chromocenter dosage compensation complex nuclear protein-containing complex X chromosome located dosage compensation complex, transcription activating ribonucleoprotein complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR016197	Chromo-like domain superfamily	Homologous Superfamily
A, B	IPR008676	MRG	Family
A, B	IPR026541	MRG domain	Domain
A, B	IPR038217	MRG, C-terminal 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 R01GM133198.