Annotations: 7ZG0

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Ndufs5	e7zg0B1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Ndufs5	ECOD (develop294)
A	Ndufs5	e7zg0A1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Ndufs5	ECOD (develop294)
F	Ndufs5	e7zg0F1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Ndufs5	ECOD (develop294)
E	Ndufs5	e7zg0E1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Ndufs5	ECOD (develop294)
H	Ndufs5	e7zg0H1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Ndufs5	ECOD (develop294)
G	Ndufs5	e7zg0G1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Ndufs5	ECOD (develop294)
D	Ndufs5	e7zg0D1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Ndufs5	ECOD (develop294)
C	Ndufs5	e7zg0C1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Ndufs5	ECOD (develop294)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
G, H	Heavy Chain	IGHV1	-	interleukin-27 subunit beta \| interleukin-27 receptor subunit alpha	SAbDab (2026-03-20)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C, D	PF00041	Fibronectin type III domain (fn3)	Fibronectin type III domain		Domain
C, D	PF24031	IL27B N-terminal FN3 domain (FN3_IL27B_N)	IL27B N-terminal FN3 domain	This entry represents the Fibronectin type III (FN3) domain found at the N-terminal of Interleukin-27 subunit beta (IL27B), from animals. This domain may be found in association with a C-terminal FN3 (Pfam:PF00041). Also known as EBI3, IL27B binds p2 ...	This entry represents the Fibronectin type III (FN3) domain found at the N-terminal of Interleukin-27 subunit beta (IL27B), from animals. This domain may be found in association with a C-terminal FN3 (Pfam:PF00041). Also known as EBI3, IL27B binds p28 to form the heterodimeric cytokine IL-27, which plays an important role in innate immunity by inducing naive CD4+ T cells proliferation [1]. IL-27 binds GP130 and IL-27Ra, acting as a bridge, to activate the JAK/STAT signaling cascade. EBI3 stabilizes the complex by binding a positively charged surface of IL-27Ra and Domain 1 of GP130 [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Interleukin-27 subunit alpha	protein binding binding signaling receptor binding molecular function activator activity molecular function regulator activity cytokine activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity interleukin-27 receptor binding cytokine receptor binding	multicellular organismal process regulation of cellular process regulation of leukocyte activation regulation of cell activation lymphocyte activation leukocyte proliferation leukocyte activation T cell activation lymphocyte proliferation regulation of immune system process regulation of multicellular organismal process T cell proliferation regulation of lymphocyte proliferation regulation of leukocyte proliferation multicellular organismal process regulation of cellular process regulation of leukocyte activation regulation of cell activation lymphocyte activation leukocyte proliferation leukocyte activation T cell activation lymphocyte proliferation regulation of immune system process regulation of multicellular organismal process T cell proliferation regulation of lymphocyte proliferation regulation of leukocyte proliferation regulation of biological process cell population proliferation biological regulation cell activation regulation of T cell activation regulation of T cell proliferation regulation of cell population proliferation mononuclear cell proliferation immune system process regulation of mononuclear cell proliferation cellular process regulation of lymphocyte activation 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 defense response response to other organism response to external stimulus response to biotic stimulus regulation of defense response to virus defense response to virus regulation of response to stimulus response to stress regulation of response to stress positive regulation of defense response to virus by host regulation of defense response to virus by host response to external biotic stimulus response to virus adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of immune effector process regulation of leukocyte differentiation regulation of alpha-beta T cell activation mononuclear cell differentiation regulation of cell differentiation lymphocyte differentiation cell activation involved in immune response regulation of cell development multicellular organism development cell differentiation anatomical structure development regulation of T-helper cell differentiation alpha-beta T cell activation T cell differentiation developmental process T-helper cell differentiation immune response regulation of adaptive immune response T-helper 1 type immune response regulation of T-helper 1 type immune response immune effector process regulation of immune response regulation of T-helper 1 cell differentiation leukocyte differentiation cellular developmental process regulation of developmental process cell development regulation of CD4-positive, alpha-beta T cell differentiation regulation of alpha-beta T cell differentiation CD4-positive, alpha-beta T cell differentiation regulation of T cell differentiation alpha-beta T cell differentiation regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains T cell activation involved in immune response alpha-beta T cell activation involved in immune response CD4-positive, alpha-beta T cell activation leukocyte activation involved in immune response lymphocyte activation involved in immune response regulation of lymphocyte differentiation regulation of multicellular organismal development hemopoiesis T cell differentiation involved in immune response adaptive immune response regulation of CD4-positive, alpha-beta T cell activation T-helper 1 cell differentiation regulation of hemopoiesis inflammatory response defense response to symbiont defense response to other organism innate immune response response to bacterium response to Gram-positive bacterium regulation of type II interferon production type II interferon production positive regulation of biological process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process cytokine production regulation of cytokine production positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of biosynthetic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of type II interferon production regulation of gene expression biosynthetic process positive regulation of gene expression positive regulation of multicellular organismal process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process	cellular anatomical structure extracellular region cell surface intracellular anatomical structure cytoplasm cytosol extracellular space
E, F	Interleukin-27 receptor subunit alpha	molecular transducer activity interleukin-27 receptor activity interleukin-17 receptor activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity	multicellular organismal process regulation of tumor necrosis factor production regulation of cellular process negative regulation of biological process negative regulation of tumor necrosis factor production cytokine production regulation of cytokine production negative regulation of cellular process regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of biological process negative regulation of metabolic process biological regulation multicellular organismal process regulation of tumor necrosis factor production regulation of cellular process negative regulation of biological process negative regulation of tumor necrosis factor production cytokine production regulation of cytokine production negative regulation of cellular process regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of biological process negative regulation of metabolic process biological regulation tumor necrosis factor superfamily cytokine production negative regulation of cytokine production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process tumor necrosis factor production regulation of gene expression negative regulation of gene expression regulation of tumor necrosis factor superfamily cytokine production biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of tumor necrosis factor superfamily cytokine production metabolic process cellular process regulation of macromolecule biosynthetic process macromolecule metabolic process negative regulation of multicellular organismal process regulation of metabolic process negative regulation of locomotion regulation of cell motility negative regulation of cellular extravasation regulation of cell migration cellular extravasation cell migration regulation of immune system process cell motility negative regulation of cell migration locomotion regulation of leukocyte migration leukocyte migration negative regulation of leukocyte migration negative regulation of immune system process immune system process regulation of locomotion negative regulation of cell motility regulation of cellular extravasation negative regulation of mononuclear cell migration regulation of lymphocyte migration regulation of T cell extravasation negative regulation of lymphocyte migration regulation of mononuclear cell migration T cell extravasation lymphocyte migration negative regulation of T cell migration negative regulation of T cell extravasation regulation of T cell migration mononuclear cell migration T cell migration interleukin-6 production regulation of interleukin-6 production negative regulation of interleukin-6 production adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains response to stimulus regulation of T-helper 17 type immune response immune response regulation of adaptive immune response negative regulation of response to stimulus negative regulation of immune response negative regulation of T-helper 17 type immune response negative regulation of adaptive immune response adaptive immune response negative regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of response to stimulus regulation of immune response T-helper 17 type immune response positive regulation of T-helper 1 type immune response positive regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains positive regulation of biological process T-helper 1 type immune response regulation of T-helper 1 type immune response positive regulation of response to stimulus positive regulation of immune response positive regulation of adaptive immune response positive regulation of immune system process negative regulation of type 2 immune response type 2 immune response regulation of type 2 immune response interleukin-17 production negative regulation of interleukin-17 production regulation of interleukin-17 production neuron apoptotic process negative regulation of neuron apoptotic process negative regulation of programmed cell death regulation of apoptotic process regulation of programmed cell death cell death negative regulation of apoptotic process apoptotic process programmed cell death regulation of neuron apoptotic process lymphocyte mediated immunity regulation of immune effector process regulation of DNA recombination regulation of leukocyte activation regulation of cell activation B cell activation involved in immune response cell activation involved in immune response regulation of primary metabolic process nucleobase-containing compound metabolic process multicellular organism development anatomical structure development leukocyte mediated immunity somatic diversification of immune receptors regulation of nucleobase-containing compound metabolic process somatic recombination of immunoglobulin genes involved in immune response system development developmental process DNA recombination primary metabolic process DNA metabolic process regulation of B cell mediated immunity immune effector process somatic diversification of immunoglobulins regulation of leukocyte mediated immunity B cell mediated immunity regulation of production of molecular mediator of immune response regulation of DNA metabolic process isotype switching immune system development immunoglobulin production immunoglobulin production involved in immunoglobulin-mediated immune response somatic cell DNA recombination lymphocyte activation leukocyte activation somatic diversification of immunoglobulins involved in immune response somatic recombination of immunoglobulin gene segments regulation of immunoglobulin mediated immune response regulation of B cell activation leukocyte activation involved in immune response lymphocyte activation involved in immune response production of molecular mediator of immune response regulation of isotype switching B cell activation cell activation immunoglobulin mediated immune response regulation of isotype switching to IgG isotypes nucleic acid metabolic process regulation of lymphocyte mediated immunity regulation of immunoglobulin production isotype switching to IgG isotypes somatic diversification of immune receptors via germline recombination within a single locus regulation of lymphocyte activation regulation of type II interferon production type II interferon production positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process positive regulation of macromolecule metabolic process positive regulation of cellular process positive regulation of type II interferon production positive regulation of gene expression positive regulation of multicellular organismal process positive regulation of cytokine production biological process involved in interspecies interaction between organisms response to other organism defense response defense response to Gram-positive bacterium response to external stimulus response to biotic stimulus defense response to bacterium response to bacterium response to stress response to external biotic stimulus	cellular anatomical structure extracellular region cell periphery plasma membrane membrane intracellular anatomical structure cytoplasm
G, H	Nanobody 5	-	-	-
C, D	Interleukin-27 subunit beta	molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity molecular function activator activity molecular function regulator activity cytokine activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity protein binding binding signaling receptor binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity molecular function activator activity molecular function regulator activity cytokine activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity protein binding binding signaling receptor binding interleukin-27 receptor binding cytokine receptor binding	multicellular organismal process cell population proliferation cell activation lymphocyte activation leukocyte proliferation leukocyte activation mononuclear cell proliferation immune system process T cell activation lymphocyte proliferation cellular process T cell proliferation	cellular anatomical structure membrane extracellular region extracellular space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR026207	Interleukin-27 alpha	Family
A, B	IPR009079	Four-helical cytokine-like, core	Homologous Superfamily
E, F	IPR003961	Fibronectin type III	Domain
E, F	IPR052672	Type I Cytokine Receptor Family, Type 2 Subfamily	Family
E, F	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
E, F	IPR036116	Fibronectin type III superfamily	Homologous Superfamily
C, D	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
C, D	IPR003961	Fibronectin type III	Domain
C, D	IPR003530	Long hematopoietin receptor, soluble alpha chain, conserved site	Conserved Site
C, D	IPR056621	IL27B, N-terminal Fn3 domain	Domain
C, D	IPR036116	Fibronectin type III superfamily	Homologous Superfamily
C, D	IPR053073	Interleukin-11/Interleukin-27 subunit beta	Family

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.