Annotations: 9U5Z

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B]	Complement C2	peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity catalytic activity endopeptidase activity cation binding ion binding binding metal ion binding small molecule binding	adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response response to stimulus positive regulation of biological process positive regulation of response to stimulus complement activation humoral immune response mediated by circulating immunoglobulin positive regulation of immune response leukocyte mediated immunity regulation of immune system process positive regulation of immune system process complement activation, classical pathway regulation of biological process adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response response to stimulus positive regulation of biological process positive regulation of response to stimulus complement activation humoral immune response mediated by circulating immunoglobulin positive regulation of immune response leukocyte mediated immunity regulation of immune system process positive regulation of immune system process complement activation, classical pathway regulation of biological process immune response biological regulation immunoglobulin mediated immune response adaptive immune response immune effector process regulation of response to stimulus immune system process B cell mediated immunity regulation of immune response activation of immune response biological process involved in interspecies interaction between organisms response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus defense response to other organism response to stress innate immune response response to external biotic stimulus response to thyroid hormone response to hormone response to endogenous stimulus response to chemical response to bacterium import into cell regulation of localization positive regulation of cellular component organization regulation of cellular process regulation of cellular component organization transport positive regulation of apoptotic cell clearance vesicle-mediated transport cellular component organization localization positive regulation of endocytosis phagocytosis apoptotic cell clearance cellular component organization or biogenesis positive regulation of cellular process regulation of endocytosis regulation of transport regulation of phagocytosis regulation of vesicle-mediated transport establishment of localization positive regulation of phagocytosis positive regulation of transport cellular process endocytosis regulation of apoptotic cell clearance response to nutrient levels response to nutrient proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process response to lipid response to oxygen-containing compound response to lipopolysaccharide response to molecule of bacterial origin	extracellular exosome membrane-bounded organelle extracellular vesicle cellular anatomical structure extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle
B [auth E]	Complement C4-B	protein binding binding complement binding enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity carbohydrate binding	import into cell transport establishment of localization vesicle-mediated transport immune effector process phagocytosis, recognition opsonization localization immune system process phagocytosis cellular process cell recognition endocytosis adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains import into cell transport establishment of localization vesicle-mediated transport immune effector process phagocytosis, recognition opsonization localization immune system process phagocytosis cellular process cell recognition endocytosis adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response response to stimulus positive regulation of biological process positive regulation of response to stimulus complement activation humoral immune response mediated by circulating immunoglobulin positive regulation of immune response leukocyte mediated immunity regulation of immune system process positive regulation of immune system process complement activation, classical pathway regulation of biological process immune response biological regulation immunoglobulin mediated immune response adaptive immune response regulation of response to stimulus B cell mediated immunity regulation of immune response activation of immune response biological process involved in interspecies interaction between organisms response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus defense response to other organism response to stress innate immune response response to external biotic stimulus inflammatory response regulation of localization positive regulation of cellular component organization regulation of cellular process regulation of cellular component organization positive regulation of apoptotic cell clearance cellular component organization positive regulation of endocytosis apoptotic cell clearance cellular component organization or biogenesis positive regulation of cellular process regulation of endocytosis regulation of transport regulation of phagocytosis regulation of vesicle-mediated transport positive regulation of phagocytosis positive regulation of transport regulation of apoptotic cell clearance detection of external biotic stimulus detection of molecule of bacterial origin detection of biotic stimulus detection of stimulus response to bacterium response to chemical detection of chemical stimulus response to molecule of bacterial origin	extracellular exosome membrane-bounded organelle extracellular vesicle cellular anatomical structure extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle cell periphery plasma membrane membrane other organism part extracellular exosome membrane-bounded organelle extracellular vesicle cellular anatomical structure extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle cell periphery plasma membrane membrane other organism part symbiont cell surface somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection blood microparticle synapse cell junction axon

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B]	IPR011360	Complement B/C2	Family
A [auth B]	IPR000436	Sushi/SCR/CCP domain	Domain
A [auth B]	IPR018114	Serine proteases, trypsin family, histidine active site	Active Site
A [auth B]	IPR035976	Sushi/SCR/CCP superfamily	Homologous Superfamily
A [auth B]	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A [auth B]	IPR036465	von Willebrand factor A-like domain superfamily	Homologous Superfamily
A [auth B]	IPR001314	Peptidase S1A, chymotrypsin family	Family
A [auth B]	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
A [auth B]	IPR001254	Serine proteases, trypsin domain	Domain
A [auth B]	IPR002035	von Willebrand factor, type A	Domain
A [auth B]	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
B [auth E]	IPR019742	Alpha-2-macroglobulin, conserved site	Conserved Site
B [auth E]	IPR009048	Alpha-macroglobulin, receptor-binding	Domain
B [auth E]	IPR041555	Macroglobulin domain MG3	Domain
B [auth E]	IPR001599	Alpha-2-macroglobulin	Domain
B [auth E]	IPR047565	Alpha-macroglobulin-like, thiol-ester bond-forming region	Conserved Site
B [auth E]	IPR018081	Anaphylatoxin, complement system	Homologous Superfamily
B [auth E]	IPR018933	Netrin module, non-TIMP type	Domain
B [auth E]	IPR001840	Anaphylatoxin, complement system domain	Domain
B [auth E]	IPR011625	Alpha-2-macroglobulin, bait region domain	Domain
B [auth E]	IPR001134	Netrin domain	Domain
B [auth E]	IPR008993	Tissue inhibitor of metalloproteinases-like, OB-fold	Homologous Superfamily
B [auth E]	IPR011626	Alpha-macroglobulin-like, TED domain	Domain
B [auth E]	IPR000020	Anaphylatoxin/fibulin	Domain
B [auth E]	IPR036595	Alpha-macroglobulin, receptor-binding domain superfamily	Homologous Superfamily
B [auth E]	IPR002890	Macroglobulin domain	Domain
B [auth E]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B [auth E]	IPR050473	Alpha-2-macroglobulin/Complement system	Family
B [auth E]	IPR008930	Terpenoid cyclases/protein prenyltransferase alpha-alpha toroid	Homologous Superfamily
B [auth E]	IPR048847	Complement C4, MG1 domain	Domain
B [auth E]	IPR054587	Complement C4A/B, CUB C-terminal domain	Domain
B [auth E]	IPR040839	Macroglobulin domain MG4	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth B]	Pharos: P06681	complement component 2 deficiency age-related macular degeneration IgA glomerulonephritis dermatomyositis irritant dermatitis MACULAR DEGENERATION, AGE-RELATED, 14 neuromyelitis optica psoriatic arthritis squamous cell lung carcinoma ulcerative colitis autism spectrum disorder Crohn disease endometriosis heart disease lung carcinoma complement component 2 deficiency age-related macular degeneration IgA glomerulonephritis dermatomyositis irritant dermatitis MACULAR DEGENERATION, AGE-RELATED, 14 neuromyelitis optica psoriatic arthritis squamous cell lung carcinoma ulcerative colitis autism spectrum disorder Crohn disease endometriosis heart disease lung carcinoma non-alcoholic fatty liver disease retinal degeneration subependymal giant cell astrocytoma age related macular degeneration 14 vitiligo cervical cancer eosinophilic esophagitis hepatitis B virus infection macular degeneration membranous glomerulonephritis non-small cell lung carcinoma skin basal cell carcinoma systemic lupus erythematosus wet macular degeneration Hashimoto thyroiditis hypertensive disorder juvenile dermatomyositis
B [auth E]	Pharos: P0C0L5	complement component 4b deficiency systemic lupus erythematosus autoimmune disease Drug Eruptions sarcoidosis ulcerative colitis age-related macular degeneration autism spectrum disorder cervical cancer endometriosis hepatitis B virus infection membranous glomerulonephritis non-alcoholic fatty liver disease squamous cell lung carcinoma wet macular degeneration complement component 4b deficiency systemic lupus erythematosus autoimmune disease Drug Eruptions sarcoidosis ulcerative colitis age-related macular degeneration autism spectrum disorder cervical cancer endometriosis hepatitis B virus infection membranous glomerulonephritis non-alcoholic fatty liver disease squamous cell lung carcinoma wet macular degeneration atopic eczema Hashimoto thyroiditis lung carcinoma psoriatic arthritis autism heart disease lupus erythematosus neuromyelitis optica