Annotations: 2LCS

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	SH3-domain	8067936	3000153	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	SH3_1	e2lcsA1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: SH3_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.30.40	Mainly Beta	Roll	SH3 type barrels.	SH3 Domains	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00018	SH3 domain (SH3_1)	SH3 domain	SH3 (Src homology 3) domains are often indicative of a protein involved in signal transduction related to cytoskeletal organisation. First described in the Src cytoplasmic tyrosine kinase Swiss:P12931. The structure is a partly opened beta barrel.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	NAP1-binding protein 2	protein-macromolecule adaptor activity molecular adaptor activity	fungal-type cell wall organization or biogenesis cell wall organization or biogenesis cellular process cellular response to stimulus regulation of cellular process response to stimulus signaling negative regulation of signaling negative regulation of intracellular signal transduction negative regulation of biological process regulation of signal transduction intracellular signal transduction negative regulation of cell communication cell communication fungal-type cell wall organization or biogenesis cell wall organization or biogenesis cellular process cellular response to stimulus regulation of cellular process response to stimulus signaling negative regulation of signaling negative regulation of intracellular signal transduction negative regulation of biological process regulation of signal transduction intracellular signal transduction negative regulation of cell communication cell communication regulation of intracellular signal transduction intracellular signaling cassette negative regulation of cellular process signal transduction regulation of biological process regulation of signaling negative regulation of response to stimulus biological regulation regulation of MAPK cascade negative regulation of signal transduction regulation of response to stimulus MAPK cascade regulation of cell communication negative regulation of MAPK cascade	intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle
B	Serine/threonine-protein kinase STE20	MAP kinase kinase kinase kinase activity protein serine/threonine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups protein serine kinase activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding MAP kinase kinase kinase kinase activity protein serine/threonine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups protein serine kinase activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding RNA binding nucleic acid binding mRNA binding histone H2BS14 kinase activity histone H2B kinase activity histone modifying activity histone kinase activity	localization transport macromolecule localization lipid localization lipid transport sterol transport organic hydroxy compound transport sterol import establishment of localization pseudohyphal growth growth cellular process growth of unicellular organism as a thread of attached cells filamentous growth localization transport macromolecule localization lipid localization lipid transport sterol transport organic hydroxy compound transport sterol import establishment of localization pseudohyphal growth growth cellular process growth of unicellular organism as a thread of attached cells filamentous growth cell growth filamentous growth of a population of unicellular organisms cytoskeleton-dependent cytokinesis reproductive process in single-celled organism reproductive process mitotic cytokinesis cytokinesis establishment or maintenance of cell polarity mitotic cell cycle asexual reproduction establishment of cell polarity mitotic cell cycle process cell cycle cell division cellular bud site selection cell budding bipolar cellular bud site selection cell cycle process invasive growth in response to glucose limitation invasive filamentous growth regulation of cell cycle phase transition regulation of cellular process cell cycle phase transition exit from mitosis cellular component organization regulation of mitotic cell cycle cellular component organization or biogenesis regulation of cell cycle regulation of biological process mitotic nuclear division regulation of cell cycle process organelle fission biological regulation regulation of mitotic cell cycle phase transition nuclear division organelle organization regulation of exit from mitosis mitotic cell cycle phase transition cellular response to stimulus signal transduction involved in filamentous growth response to stimulus signaling cell communication signal transduction positive regulation of programmed cell death regulation of apoptotic process positive regulation of biological process regulation of programmed cell death cell death positive regulation of apoptotic process apoptotic process programmed cell death positive regulation of cellular process regulation of signaling regulation of signal transduction regulation of MAPK cascade intracellular signal transduction regulation of intracellular signal transduction regulation of response to stimulus intracellular signaling cassette MAPK cascade regulation of cell communication budding cell bud growth budding cell apical bud growth cellular response to oxidative stress response to oxygen-containing compound cellular response to chemical stress cellular response to oxygen-containing compound cellular response to hydrogen peroxide response to reactive oxygen species response to hydrogen peroxide response to oxidative stress cellular response to reactive oxygen species cellular response to chemical stimulus cellular response to stress response to stress response to chemical vacuole organization organelle inheritance vacuole inheritance cellular component biogenesis cellular component assembly stress granule assembly organelle assembly non-membrane-bounded organelle assembly sexual reproduction response to pheromone conjugation with cellular fusion cellular response to pheromone response to pheromone triggering conjugation with cellular fusion regulation of reproductive process regulation of conjugation with cellular fusion positive regulation of conjugation with cellular fusion positive regulation of reproductive process pheromone-dependent signal transduction involved in conjugation with cellular fusion signal transduction involved in positive regulation of conjugation with cellular fusion cellular biosynthetic process negative regulation of biological process negative regulation of cellular metabolic process negative regulation of cellular process negative regulation of macromolecule metabolic process regulation of biosynthetic process cellular metabolic process negative regulation of metabolic process 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 regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process transcription by RNA polymerase II negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of transcription by RNA polymerase II negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II primary metabolic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process regulation of DNA-templated transcription negative regulation of RNA metabolic process regulation of localization negative regulation of sterol transport regulation of lipid transport negative regulation of transport negative regulation of lipid localization negative regulation of sterol import regulation of sterol transport negative regulation of lipid transport regulation of transport regulation of sterol import regulation of lipid localization response to osmotic stress osmosensory signaling pathway via Sho1 osmosensor cellular response to osmotic stress cellular response to environmental stimulus osmosensory signaling pathway response to abiotic stimulus cellular response to abiotic stimulus	incipient cellular bud site cellular anatomical entity site of polarized growth cell projection mating projection cell tip mating projection tip cell pole plasma membrane bounded cell projection cell periphery plasma membrane membrane intracellular anatomical structure cytoplasm incipient cellular bud site cellular anatomical entity site of polarized growth cell projection mating projection cell tip mating projection tip cell pole plasma membrane bounded cell projection cell periphery plasma membrane membrane intracellular anatomical structure cytoplasm membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001452	SH3 domain	Domain
A	IPR050384	Endophilin/SH3RF	Family
A	IPR036028	SH3-like domain superfamily	Homologous Superfamily
B	IPR000095	CRIB domain	Domain
B	IPR017441	Protein kinase, ATP binding site	Binding Site
B	IPR050285	STE20 Serine/Threonine-Protein Kinase	Family
B	IPR000719	Protein kinase domain	Domain
B	IPR036936	CRIB domain superfamily	Homologous Superfamily
B	IPR033923	p21 activated kinase binding domain	Domain
B	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
B	IPR008271	Serine/threonine-protein kinase, active site	Active Site

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.