Annotations: 9VCA

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth E]	SCOP2B Superfamily	Concanavalin A-like lectins/glucanases	8041434	3000120	SCOP2B (2022-06-29)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV1	-	c-reactive protein	SAbDab (2025-12-26)
C [auth L]	Light Chain	IGKV3	Kappa	c-reactive protein	SAbDab (2025-12-26)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth E]	PF00354	Pentaxin family (Pentaxin)	Pentaxin family	Pentaxins are also known as pentraxins.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth E]	C-reactive protein	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding lipoprotein particle binding protein-containing complex binding protein-lipid complex binding low-density lipoprotein particle binding complement component C1q complex binding opsonin binding protein binding complement binding cation binding ion binding binding calcium ion binding metal ion binding small molecule binding lipoprotein particle binding protein-containing complex binding protein-lipid complex binding low-density lipoprotein particle binding complement component C1q complex binding opsonin binding protein binding complement binding choline binding low-density lipoprotein particle receptor binding signaling receptor binding lipoprotein particle receptor binding identical protein 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 developmental process 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 developmental process regulation of biological process regulation of cellular process regulation of developmental process cellular developmental process negative regulation of developmental process macrophage derived foam cell differentiation biological regulation negative regulation of biological process regulation of cell differentiation negative regulation of macrophage derived foam cell differentiation foam cell differentiation cell differentiation negative regulation of cellular process regulation of macrophage derived foam cell differentiation negative regulation of cell differentiation reactive oxygen species metabolic process positive regulation of biological process regulation of superoxide metabolic process positive regulation of reactive oxygen species metabolic process superoxide metabolic process positive regulation of metabolic process superoxide anion generation metabolic process positive regulation of superoxide anion generation regulation of superoxide anion generation regulation of metabolic process regulation of reactive oxygen species metabolic process positive regulation of cellular process regulation of leukocyte proliferation negative regulation of cell population proliferation cell population proliferation leukocyte proliferation negative regulation of mononuclear cell proliferation negative regulation of leukocyte proliferation regulation of cell population proliferation mononuclear cell proliferation regulation of mononuclear cell proliferation regulation of biosynthetic process multicellular organismal process interleukin-8 production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression biosynthetic process cytokine production regulation of cytokine production regulation of macromolecule biosynthetic process regulation of multicellular organismal process macromolecule metabolic process regulation of interleukin-8 production acute-phase response response to stimulus defense response response to stress inflammatory response acute inflammatory response positive regulation of macromolecule biosynthetic process positive regulation of gene expression positive regulation of biosynthetic process positive regulation of macromolecule metabolic process regulation of tube diameter system process regulation of tube size circulatory system process vascular process in circulatory system blood vessel diameter maintenance regulation of biological quality vasoconstriction blood circulation regulation of anatomical structure size biological process involved in interspecies interaction between organisms immune response response to other organism defense response to symbiont response to external stimulus response to biotic stimulus defense response to other organism innate immune response response to external biotic stimulus regulation of localization lipid storage lipid localization negative regulation of lipid localization regulation of lipid storage regulation of lipid localization negative regulation of lipid storage macromolecule localization nutrient storage defense response to Gram-positive bacterium defense response to bacterium response to bacterium	cellular anatomical structure extracellular region extracellular space
B [auth H]	Monoclonal IgG antibody heavy chain fragment	-	-	-
C [auth L]	Monoclonal IgG antibody light chain fragment	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth E]	IPR030476	Pentaxin, conserved site	Conserved Site
A [auth E]	IPR051005	Pentraxin domain-containing protein	Family
A [auth E]	IPR013320	Concanavalin A-like lectin/glucanase domain superfamily	Homologous Superfamily
A [auth E]	IPR001759	Pentraxin domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth E]	Pharos: P02741	coronary artery disease Crohn disease malaria rheumatoid arthritis periodontitis heart disease atherosclerosis metabolic syndrome X hypertensive disorder obesity disorder leishmaniasis diabetic retinopathy psoriasis secondary hyperparathyroidism cardiovascular disease coronary artery disease Crohn disease malaria rheumatoid arthritis periodontitis heart disease atherosclerosis metabolic syndrome X hypertensive disorder obesity disorder leishmaniasis diabetic retinopathy psoriasis secondary hyperparathyroidism cardiovascular disease hypertriglyceridemia myocarditis Infection acute coronary syndrome thrombotic disease metabolic disease substance withdrawal syndrome systemic lupus erythematosus infectious meningitis congestive heart failure interstitial nephritis chronic kidney disease visceral leishmaniasis pustulosis palmaris et plantaris exanthem major depressive disorder asthma rheumatic disorder heart failure meningitis autoimmune disease hepatocellular carcinoma mucocutaneous lymph node syndrome syphilis cerebrovascular disorder thrombocytosis disease obstructive sleep apnea syndrome chronic obstructive pulmonary disease inflammatory bowel disease anemia pancreatic ductal adenocarcinoma type 1 diabetes mellitus interstitial lung disease urinary tract infection kidney disease appendicitis peripheral neuropathy pneumonia diarrheal disease lung benign neoplasm arthritic joint disease pulmonary embolism drug-induced liver injury pyuria hyperglycemia ileocolitis cholecystitis thrombophilia adult acute respiratory distress syndrome osteomyelitis COVID-19 influenza anxiety disorder pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia Crohn's colitis type 2 diabetes mellitus pericardial effusion vasculitis peripheral vascular disease prediabetes syndrome epidural abscess lymphopenia arthropathy schizophrenia hepatitis B virus infection cancer synovitis myocardial ischemia cellulitis thrombocytopenia inborn carbohydrate metabolic disorder allergic disease COVID-19–associated multisystem inflammatory syndrome in children tuberculosis inherited lipid metabolism disorder pancreatitis intestinal obstruction aortic disease pericarditis peripheral arterial disease liver disease arteriosclerosis disorder peritonitis lupus erythematosus

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.