Annotations: 7UI5

Evolution avoids a pathological stabilizing interaction in the immune protein S100A9

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	EF-hand	8033752	3001983	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	EF-hand	8033752	3001983	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)
B	MIF4G	e7ui5B1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
A		e7ui5A01	A: beta barrels	X: Fe-binding domain in prismane-like proteins	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01023	S-100/ICaBP type calcium binding domain (S_100)	S-100/ICaBP type calcium binding domain	The S-100 domain is a subfamily of the EF-hand calcium binding proteins.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Protein S100-A9	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding antioxidant activity Toll-like receptor 4 binding protein binding signaling receptor binding Toll-like receptor binding arachidonate binding fatty acid binding icosanoid binding cation binding ion binding binding calcium ion binding metal ion binding small molecule binding antioxidant activity Toll-like receptor 4 binding protein binding signaling receptor binding Toll-like receptor binding arachidonate binding fatty acid binding icosanoid binding organic acid binding long-chain fatty acid binding icosatetraenoic acid binding anion binding lipid binding carboxylic acid binding monocarboxylic acid binding cytoskeletal protein binding microtubule binding tubulin binding RAGE receptor binding calcium-dependent protein binding transition metal ion binding zinc ion binding	regulation of growth regulation of biological process regulation of cellular process regulation of cellular component organization biological regulation growth positive regulation of biological process positive regulation of cell growth regulation of cell growth cell growth cellular component organization positive regulation of growth cellular process cellular component organization or biogenesis regulation of growth regulation of biological process regulation of cellular process regulation of cellular component organization biological regulation growth positive regulation of biological process positive regulation of cell growth regulation of cell growth cell growth cellular component organization positive regulation of growth cellular process cellular component organization or biogenesis positive regulation of cellular process regulation of immune effector process multicellular organismal process regulation of defense response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms response to stimulus regulation of response to external stimulus response to biotic stimulus regulation of respiratory burst involved in inflammatory response response to stress regulation of response to stress innate immune response regulation of immune system process regulation of multicellular organismal process response to external biotic stimulus regulation of respiratory burst production of molecular mediator involved in inflammatory response respiratory burst involved in defense response defense response immune response response to other organism regulation of innate immune response defense response to symbiont response to external stimulus regulation of inflammatory response immune effector process respiratory burst regulation of response to stimulus immune system process defense response to other organism respiratory burst involved in inflammatory response regulation of immune response metabolic process inflammatory response regulation of metabolic process positive regulation of response to stimulus positive regulation of response to external stimulus positive regulation of inflammatory response positive regulation of defense response chronic inflammatory response catabolic process autophagy process utilizing autophagic mechanism endothelial cell migration cell migration cell motility cell chemotaxis cellular response to stimulus chemotaxis neutrophil chemotaxis neutrophil migration granulocyte migration leukocyte migration cellular response to chemical stimulus taxis granulocyte chemotaxis response to chemical myeloid leukocyte migration leukocyte chemotaxis locomotion apoptotic process cell death programmed cell death signaling cell-cell signaling cell communication regulation of cytoskeleton organization regulation of organelle organization organelle organization cytoskeleton organization defense response to bacterium response to bacterium leukocyte migration involved in inflammatory response positive regulation of response to biotic stimulus pattern recognition receptor signaling pathway toll-like receptor signaling pathway regulation of signal transduction immune response-activating signaling pathway positive regulation of immune response signal transduction positive regulation of immune system process innate immune response-activating signaling pathway regulation of pattern recognition receptor signaling pathway activation of innate immune response regulation of toll-like receptor signaling pathway activation of immune response immune response-regulating signaling pathway regulation of signaling positive regulation of innate immune response regulation of cell communication developmental process cellular developmental process astrocyte differentiation cell development nervous system development glial cell development multicellular organism development neurogenesis astrocyte development central nervous system development gliogenesis glial cell differentiation cell differentiation anatomical structure development system development autocrine signaling regulation of neuron projection development positive regulation of cellular component organization cell projection organization neuron projection development neuron differentiation positive regulation of neuron projection development positive regulation of cell projection organization plasma membrane bounded cell projection organization regulation of cell projection organization generation of neurons neuron development regulation of plasma membrane bounded cell projection organization neutrophil aggregation cell adhesion cell-cell adhesion leukocyte cell-cell adhesion leukocyte aggregation peptidyl-cysteine modification primary metabolic process peptidyl-cysteine S-nitrosylation peptidyl-cysteine S-trans-nitrosylation macromolecule modification peptidyl-amino acid modification protein metabolic process macromolecule metabolic process protein modification process protein nitrosylation humoral immune response antimicrobial humoral response antimicrobial humoral immune response mediated by antimicrobial peptide defense response to fungus response to fungus positive regulation of cell communication positive regulation of signal transduction regulation of programmed cell death regulation of intrinsic apoptotic signaling pathway intracellular signal transduction positive regulation of apoptotic signaling pathway regulation of intracellular signal transduction intrinsic apoptotic signaling pathway positive regulation of programmed cell death regulation of apoptotic process positive regulation of intracellular signal transduction positive regulation of apoptotic process apoptotic signaling pathway positive regulation of intrinsic apoptotic signaling pathway regulation of apoptotic signaling pathway positive regulation of signaling	extracellular exosome membrane-bounded organelle extracellular vesicle cellular anatomical structure extracellular organelle extracellular region organelle vesicle extracellular membrane-bounded organelle intracellular anatomical structure cytoplasm cytosol cell periphery plasma membrane extracellular exosome membrane-bounded organelle extracellular vesicle cellular anatomical structure extracellular organelle extracellular region organelle vesicle extracellular membrane-bounded organelle intracellular anatomical structure cytoplasm cytosol cell periphery plasma membrane membrane extracellular matrix external encapsulating structure intracellular organelle cytoskeleton membraneless organelle intracellular membraneless organelle vesicle lumen intracellular vesicle membrane-enclosed lumen cytoplasmic vesicle lumen secretory granule lumen intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen cytoplasmic vesicle organelle lumen secretory granule secretory vesicle intermediate filament cytoskeleton nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR001751	S100/Calcium binding protein 7/8-like, conserved site	Conserved Site
A, B	IPR002048	EF-hand domain	Domain
A, B	IPR011992	EF-hand domain pair	Homologous Superfamily
A, B	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
A, B	IPR013787	S100/CaBP-9k-type, calcium binding, subdomain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	: P06702	malignant colon neoplasm adult acute respiratory distress syndrome keloid Liver Cirrhosis, Experimental nasopharyngeal carcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia sinusitis B-cell chronic lymphocytic leukemia colonic neoplasm cystic fibrosis gastric carcinoma lung cancer MALT lymphoma osteosarcoma psoriasis malignant colon neoplasm adult acute respiratory distress syndrome keloid Liver Cirrhosis, Experimental nasopharyngeal carcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia sinusitis B-cell chronic lymphocytic leukemia colonic neoplasm cystic fibrosis gastric carcinoma lung cancer MALT lymphoma osteosarcoma psoriasis tuberculosis asthma benign colon neoplasm Crohn disease dermatomyositis glioblastoma large cell medulloblastoma lung carcinoma myopathy ovarian cancer schizophrenia ulcerative colitis atopic eczema breast carcinoma cutaneous lupus erythematosus esophageal adenocarcinoma interstitial cystitis

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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.