Annotations: 4EBY

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	LysM_4	e4ebyA7	A: alpha arrays	X: HTH	H: LysM domain (From Topology)	T: LysM domain	F: LysM_4	ECOD (1.6)
A	LysM_1	e4ebyA3	A: alpha arrays	X: HTH	H: LysM domain (From Topology)	T: LysM domain	F: LysM_1	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF23577	LysM domain (LysM_RLK)	LysM domain	This entry represents a set of LysM domains found in the LysM domain receptor-like kinase family is involved in innate immunity and symbiotic interactions in plants. Members of this family function as cell surface receptors that recognize specific mo ...	This entry represents a set of LysM domains found in the LysM domain receptor-like kinase family is involved in innate immunity and symbiotic interactions in plants. Members of this family function as cell surface receptors that recognize specific molecular patterns associated with microbial activity, such as chitin oligosaccharides and peptidoglycans. These receptors play crucial roles in plant defense by detecting pathogen-associated molecular patterns (PAMPs) and microbe-associated molecular patterns (MAMPs), leading to the activation of defense genes. They are also involved in symbiotic relationships, such as the nitrogen-fixing root nodule symbiosis with rhizobia, by recognizing Nod factor signals. The family includes kinases that phosphorylate downstream partners in response to elicitation, mediating signal transduction from the extracellular to intracellular spaces and contributing to resistance against pathogenic fungi and bacteria.	Domain
A	PF23472	LYK3/4/5 LysM2 domain (LysM2_CERK1_LYK3_4_5)	LYK3/4/5 LysM2 domain	This entry represents the second LysM domain found in proteins from plants, including LYK3 from Medicago truncatula, CERK1 and LYK4/5 from Arabidopsis thaliana. The LysM domain adopt a beta-alpha-alpha-beta fold, according to structure predictions. A ...	This entry represents the second LysM domain found in proteins from plants, including LYK3 from Medicago truncatula, CERK1 and LYK4/5 from Arabidopsis thaliana. The LysM domain adopt a beta-alpha-alpha-beta fold, according to structure predictions. Arabidopsis thaliana has retained the root developmental response to chitin-derived signals, utilising a widely conserved pathway involving CERK1 [1]. LYK4 is a chitin-binding protein and contributes to chitin-triggered immunity [2]. LYK5 has been identified as a receptor with a very high affinity to chitooligosaccharides [2]. Medicago LYK3 has an active intracellular kinase and Medicago NFP has a pseudokinase domain [3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Chitin elicitor receptor kinase 1	kinase activity transferase activity catalytic activity transferase activity, transferring phosphorus-containing groups cation binding chitosan binding binding ion binding carbohydrate derivative binding small molecule binding catalytic activity, acting on a protein protein kinase activity protein serine kinase activity phosphotransferase activity, alcohol group as acceptor kinase activity transferase activity catalytic activity transferase activity, transferring phosphorus-containing groups cation binding chitosan binding binding ion binding carbohydrate derivative binding small molecule binding catalytic activity, acting on a protein protein kinase activity protein serine kinase activity phosphotransferase activity, alcohol group as acceptor adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding ribonucleotide binding identical protein binding protein binding protein homodimerization activity protein dimerization activity protein serine/threonine kinase activity molecular transducer activity signaling receptor activity transmembrane receptor protein kinase activity transmembrane signaling receptor activity chitin binding	response to stimulus response to chemical response to oxygen-containing compound response to nitrogen compound response to chitin cellular response to stimulus positive regulation of response to biotic stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process pattern recognition receptor signaling pathway response to biotic stimulus cell communication immune response-activating signaling pathway positive regulation of immune response response to stimulus response to chemical response to oxygen-containing compound response to nitrogen compound response to chitin cellular response to stimulus positive regulation of response to biotic stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process pattern recognition receptor signaling pathway response to biotic stimulus cell communication immune response-activating signaling pathway positive regulation of immune response regulation of immune system process signal transduction positive regulation of immune system process innate immune response-activating signaling pathway regulation of biological process immune response response to other organism immune response-activating cell surface receptor signaling pathway regulation of innate immune response response to external stimulus regulation of response to stimulus defense response to other organism positive regulation of defense response activation of innate immune response regulation of immune response activation of immune response regulation of defense response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of response to external stimulus signaling positive regulation of biological process innate immune response activating cell surface receptor signaling pathway positive regulation of response to stimulus positive regulation of response to external stimulus immune response-regulating signaling pathway regulation of response to stress response to stress innate immune response response to external biotic stimulus cell surface pattern recognition receptor signaling pathway positive regulation of innate immune response cell surface receptor signaling pathway defense response biological regulation defense response to symbiont immune system process cellular process detection of peptidoglycan detection of external biotic stimulus detection of molecule of bacterial origin detection of biotic stimulus detection of stimulus response to bacterium detection of chemical stimulus response to molecule of bacterial origin response to peptidoglycan defense response to bacterium cellular response to nitrogen compound cellular response to chitin cellular response to oxygen-containing compound cellular response to chemical stimulus protein phosphorylation protein autophosphorylation 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 molecule of fungal origin response to fungus detection of molecule of fungal origin cellular response to molecule of bacterial origin cellular response to biotic stimulus defense response to fungus intracellular signal transduction	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR017441	Protein kinase, ATP binding site	Binding Site
A	IPR000719	Protein kinase domain	Domain
A	IPR001245	Serine-threonine/tyrosine-protein kinase, catalytic domain	Domain
A	IPR018392	LysM domain	Domain
A	IPR044812	LysM domain receptor kinase CERK1/LYK3-like	Family
A	IPR056562	LYK3/4/5, second LysM domain	Domain
A	IPR057097	LYK3/RLK10-like, LysM domain	Domain
A	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
A	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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.