Annotations: 4NN6

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	TSLP	e4nn6A1	A: alpha bundles	X: Ferritin/Heme oxygenase/4-helical cytokines	H: 4-helical cytokines (From Topology)	T: 4-helical cytokines	F: TSLP	ECOD (1.6)
B	fn3_6	e4nn6B3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: fn3_6	ECOD (1.6)
B	EUF07713	e4nn6B4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: EUF07713	ECOD (1.6)
C	fn3_6	e4nn6C6	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: fn3_6	ECOD (1.6)
C	IL6Ra-bind_1	e4nn6C5	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: IL6Ra-bind_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1250.90	Mainly Alpha	Up-down Bundle	Growth Hormone	Chain: A	CATH (4.3.0)
B	2.60.40.1870	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C	PF21605	Cytokine receptor-like factor 2-like, D2 domain (CRLF2-like_D2)	Cytokine receptor-like factor 2-like, D2 domain	CRLF2 is a receptor for thymic stromal lymphopoietin (TSLP). It forms a functional complex with TSLP and IL7R which is capable of stimulating cell proliferation through activation of STAT3 and STAT5. CRFL2 is implicated in the development of the hema ...	CRLF2 is a receptor for thymic stromal lymphopoietin (TSLP). It forms a functional complex with TSLP and IL7R which is capable of stimulating cell proliferation through activation of STAT3 and STAT5. CRFL2 is implicated in the development of the hematopoietic system [1]. It consists of two FnIII-like domains, D1 and D2. This entry represents the membrane-proximal D2 domain, which displays a an ABE/C'CFG topology with two disulfide bridges [1]. This domain interacts with IL7R D2 domain and forms a compact network of interactions [1]. This domain is also found in the cytokine receptor common subunit gamma (IL2RG), a common subunit for the receptors for a variety of interleukins [2,3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Thymic stromal lymphopoietin	protein binding binding molecular function activator activity signaling receptor binding molecular function regulator activity cytokine activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity	-	cellular anatomical structure extracellular region extracellular space
B	Interleukin-7 receptor subunit alpha	molecular transducer activity transmembrane signaling receptor activity signaling receptor activity interleukin-7 receptor activity cytokine receptor activity immune receptor activity	cellular homeostasis homeostatic process developmental process immune system development multicellular organism development multicellular organismal process lymph node development immune system process animal organ development anatomical structure development hematopoietic or lymphoid organ development system development cellular response to stimulus positive regulation of cell communication cellular homeostasis homeostatic process developmental process immune system development multicellular organism development multicellular organismal process lymph node development immune system process animal organ development anatomical structure development hematopoietic or lymphoid organ development system development cellular response to stimulus positive regulation of cell communication cell surface receptor signaling pathway via STAT regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process positive regulation of receptor signaling pathway via STAT regulation of signal transduction cell communication positive regulation of response to stimulus signal transduction positive regulation of cellular process regulation of biological process regulation of signaling cell surface receptor signaling pathway biological regulation regulation of response to stimulus regulation of cell communication cellular process regulation of receptor signaling pathway via STAT positive regulation of signaling regulation of biosynthetic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of macromolecule biosynthetic process regulation of gene expression positive regulation of metabolic process biosynthetic process positive regulation of gene expression positive regulation of biosynthetic process regulation of macromolecule biosynthetic process metabolic process positive regulation of macromolecule metabolic process macromolecule metabolic process regulation of metabolic process cellular component organization regulation of cellular component size cellular component organization or biogenesis regulation of biological quality regulation of cell size regulation of anatomical structure size multicellular organismal-level homeostasis leukocyte homeostasis T cell homeostasis homeostasis of number of cells lymphocyte homeostasis B cell homeostasis regulation of leukocyte differentiation regulation of leukocyte activation regulation of cell activation mononuclear cell differentiation regulation of cell differentiation lymphocyte differentiation positive regulation of T cell differentiation regulation of cell development T cell differentiation in thymus positive regulation of developmental process positive regulation of cell activation positive regulation of T cell differentiation in thymus T cell activation cell differentiation positive regulation of leukocyte activation T cell differentiation regulation of immune system process positive regulation of immune system process positive regulation of T cell activation positive regulation of cell development regulation of leukocyte cell-cell adhesion positive regulation of multicellular organismal process leukocyte differentiation cellular developmental process regulation of developmental process cell development positive regulation of leukocyte cell-cell adhesion regulation of T cell differentiation in thymus lymphocyte activation leukocyte cell-cell adhesion leukocyte activation positive regulation of cell-cell adhesion regulation of T cell differentiation positive regulation of lymphocyte activation cell adhesion cell-cell adhesion positive regulation of hemopoiesis positive regulation of cell differentiation regulation of multicellular organismal process regulation of cell-cell adhesion regulation of lymphocyte differentiation regulation of multicellular organismal development hemopoiesis positive regulation of cell adhesion regulation of cell adhesion cell activation regulation of T cell activation regulation of hemopoiesis positive regulation of leukocyte differentiation positive regulation of lymphocyte differentiation regulation of lymphocyte activation adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains T cell mediated cytotoxicity lymphocyte mediated immunity T cell mediated immunity immune response leukocyte mediated cytotoxicity adaptive immune response immune effector process leukocyte mediated immunity cell killing cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation B cell activation B cell proliferation leukocyte proliferation mononuclear cell proliferation lymphocyte proliferation regulation of immune effector process negative regulation of biological process negative regulation of lymphocyte mediated immunity regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains negative regulation of leukocyte mediated cytotoxicity negative regulation of cellular process negative regulation of cell killing regulation of T cell mediated immunity regulation of adaptive immune response negative regulation of response to stimulus negative regulation of immune response negative regulation of T cell mediated cytotoxicity negative regulation of immune effector process regulation of leukocyte mediated cytotoxicity negative regulation of adaptive immune response negative regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of leukocyte mediated immunity regulation of T cell mediated cytotoxicity regulation of lymphocyte mediated immunity negative regulation of immune system process regulation of immune response regulation of cell killing negative regulation of leukocyte mediated immunity negative regulation of T cell mediated immunity anatomical structure morphogenesis cell morphogenesis regulation of leukocyte apoptotic process regulation of lymphocyte apoptotic process negative regulation of programmed cell death leukocyte apoptotic process regulation of apoptotic process regulation of programmed cell death cell death negative regulation of T cell apoptotic process lymphocyte apoptotic process negative regulation of apoptotic process negative regulation of leukocyte apoptotic process regulation of T cell apoptotic process T cell apoptotic process apoptotic process programmed cell death negative regulation of lymphocyte apoptotic process 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 defense response to other organism response to stress response to bacterium response to external biotic stimulus	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen
C	Cytokine receptor-like factor 2	-	response to stimulus defense response response to stress inflammatory response	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR038329	Thymic stromal lymphopoietin superfamily	Homologous Superfamily
A	IPR029189	Thymic stromal lymphopoietin	Family
B	IPR003531	Short hematopoietin receptor, family 1, conserved site	Conserved Site
B	IPR003961	Fibronectin type III	Domain
B	IPR040997	IL-7Ralpha, fibronectin type III domain	Domain
B	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B	IPR036116	Fibronectin type III superfamily	Homologous Superfamily
C	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
C	IPR053856	Cytokine receptor-like factor 2-like, domain 1	Domain
C	IPR003961	Fibronectin type III	Domain
C	IPR048648	Cytokine receptor-like factor 2-like, D2 domain	Domain
C	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

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.