Annotations: 5IRI

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	KOG0588	e5iriA1	A: a+b two layers	X: TBP-like	H: Kinase associated domain 1, KA1 (From Topology)	T: Kinase associated domain 1, KA1	F: KOG0588	ECOD (1.6)
B	KOG0588	e5iriB1	A: a+b two layers	X: TBP-like	H: Kinase associated domain 1, KA1 (From Topology)	T: Kinase associated domain 1, KA1	F: KOG0588	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF21122	BRSK1/2 KA1 domain (KA1_BRSK)	BRSK1/2 KA1 domain	This entry represents the KA1-like domain found in the brain-specific kinases BRSK1 and BRSK2 [1-2]. The BRSK/SAD kinase family includes serine/threonine-protein kinases that play crucial roles in neuronal polarization, centrosome duplication, cell c ...	This entry represents the KA1-like domain found in the brain-specific kinases BRSK1 and BRSK2 [1-2]. The BRSK/SAD kinase family includes serine/threonine-protein kinases that play crucial roles in neuronal polarization, centrosome duplication, cell cycle progression, and insulin secretion. Members phosphorylate a variety of substrates including CDC25B, CDC25C, MAPT/TAU, and WEE1, modulating their activities. Activation by STK11/LKB1 is a common regulatory mechanism, leading to phosphorylation of microtubule-associated proteins and influencing neuron polarization. These kinases also contribute to synaptic vesicle function and neurotransmitter release, regulate the mitotic cell cycle, and respond to DNA damage. Additionally, they are involved in actin cytoskeleton reorganization and may play a role in the apoptotic response to endoplasmic reticulum stress.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Serine/threonine-protein kinase BRSK1	protein serine/threonine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups histone H2AS121 kinase activity histone modifying activity histone H2A kinase activity catalytic activity histone kinase activity AMP-activated protein kinase activity DNA-dependent protein kinase activity protein serine/threonine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups histone H2AS121 kinase activity histone modifying activity histone H2A kinase activity catalytic activity histone kinase activity AMP-activated protein kinase activity DNA-dependent protein kinase activity histone H3T45 kinase activity histone H3 kinase activity eukaryotic translation initiation factor 2alpha kinase activity tau-protein kinase activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding histone H3T6 kinase activity histone H3T3 kinase activity histone H2BS14 kinase activity histone H2B kinase activity histone H3S57 kinase activity Rho-dependent protein serine/threonine kinase activity molecular function inhibitor activity molecular function regulator activity histone H2AT120 kinase activity histone H2AXS139 kinase activity histone H2AX kinase activity histone H4S1 kinase activity histone H4 kinase activity protein serine kinase activity cation binding magnesium ion binding metal ion binding cytoskeletal protein binding protein binding gamma-tubulin binding tubulin binding kinase binding enzyme binding protein kinase binding histone H3T11 kinase activity histone H3S28 kinase activity 3-phosphoinositide-dependent protein kinase activity histone H2BS36 kinase activity histone H2AS1 kinase activity ribosomal protein S6 kinase activity histone H3S10 kinase activity	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process microtubule organizing center organization microtubule cytoskeleton organization cellular component organization centrosome duplication organelle organization centrosome cycle microtubule-based process cell cycle cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process microtubule organizing center organization microtubule cytoskeleton organization cellular component organization centrosome duplication organelle organization centrosome cycle microtubule-based process cell cycle cellular component organization or biogenesis cytoskeleton organization cell cycle process establishment of cell polarity establishment or maintenance of cell polarity multicellular organismal process axonogenesis cellular developmental process cell projection organization plasma membrane bounded cell projection morphogenesis cell development neuron projection development cell morphogenesis neurogenesis multicellular organism development cell projection morphogenesis neuron differentiation neuron projection morphogenesis cell differentiation anatomical structure development system development developmental process plasma membrane bounded cell projection organization nervous system development axon development cell morphogenesis involved in neuron differentiation generation of neurons anatomical structure morphogenesis neuron development protein phosphorylation phosphorylation primary metabolic process macromolecule modification phosphate-containing compound metabolic process metabolic process protein metabolic process macromolecule metabolic process protein modification process phosphorus metabolic process response to light stimulus response to radiation response to abiotic stimulus response to UV cellular localization regulated exocytosis regulation of cellular process regulation of cellular component organization synaptic vesicle priming transport signaling regulation of synaptic vesicle priming synaptic vesicle cycle synaptic vesicle exocytosis vesicle-mediated transport cell communication vesicle-mediated transport in synapse cellular component biogenesis localization synaptic signaling regulation of protein-containing complex assembly cellular component assembly secretion by cell signal release establishment of localization in cell protein-containing complex assembly trans-synaptic signaling regulation of biological process neurotransmitter secretion protein-containing complex organization secretion biological regulation export from cell cell-cell signaling neurotransmitter transport regulation of cellular component biogenesis establishment of localization chemical synaptic transmission signal release from synapse exocytosis anterograde trans-synaptic signaling exocytic process cell cycle G2/M phase transition mitotic cell cycle process G2/M transition of mitotic cell cycle cell cycle phase transition mitotic cell cycle mitotic cell cycle phase transition establishment of planar polarity epithelium development morphogenesis of an epithelium tissue development microtubule cytoskeleton organization involved in establishment of planar polarity tissue morphogenesis establishment of tissue polarity morphogenesis of a polarized epithelium regulation of neuron projection development regulation of developmental process regulation of axonogenesis regulation of anatomical structure morphogenesis regulation of cell projection organization regulation of plasma membrane bounded cell projection organization regulation of cell cycle phase transition DNA damage checkpoint signaling mitotic G2 DNA damage checkpoint signaling negative regulation of biological process negative regulation of cell cycle intracellular signal transduction negative regulation of mitotic cell cycle mitotic G2/M transition checkpoint regulation of mitotic cell cycle mitotic DNA integrity checkpoint signaling mitotic DNA damage checkpoint signaling negative regulation of cellular process negative regulation of cell cycle phase transition signal transduction regulation of cell cycle negative regulation of mitotic cell cycle phase transition regulation of G2/M transition of mitotic cell cycle regulation of cell cycle process DNA integrity checkpoint signaling regulation of cell cycle G2/M phase transition negative regulation of cell cycle process cell cycle checkpoint signaling regulation of mitotic cell cycle phase transition mitotic cell cycle checkpoint signaling negative regulation of cell cycle G2/M phase transition signal transduction in response to DNA damage negative regulation of G2/M transition of mitotic cell cycle regulation of synaptic plasticity regulation of signaling modulation of chemical synaptic transmission regulation of trans-synaptic signaling regulation of cell communication regulation of biological quality behavior system process learning learning or memory nervous system process cognition associative learning	presynapse cellular anatomical structure synapse cell junction presynaptic active zone intracellular anatomical structure cytoplasm cholinergic synapse membrane-bounded organelle transport vesicle intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle presynapse cellular anatomical structure synapse cell junction presynaptic active zone intracellular anatomical structure cytoplasm cholinergic synapse membrane-bounded organelle transport vesicle intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle synaptic vesicle organelle secretory vesicle vesicle exocytic vesicle centrosome microtubule organizing center cytoskeleton membraneless organelle intracellular membraneless organelle microtubule cytoskeleton axon cell projection distal axon neuron projection plasma membrane bounded cell projection nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen postsynaptic density postsynapse neuron to neuron synapse postsynaptic specialization asymmetric synapse

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR000719	Protein kinase domain	Domain
A, B	IPR048622	BRSK1/2-like, UBA domain	Domain
A, B	IPR017441	Protein kinase, ATP binding site	Binding Site
A, B	IPR015940	Ubiquitin-associated domain	Domain
A, B	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
A, 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.