8GO8 | pdb_00008go8

Structure of beta-arrestin1 in complex with a phosphopeptide corresponding to the human C5a anaphylatoxin chemotactic receptor 1, C5aR1

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Protein Modification Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
H [auth M]	Gasdermin	e8go8M1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Gasdermin	ECOD (v294.1)
G [auth L]	Gasdermin	e8go8L1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Gasdermin	ECOD (v294.1)
F [auth I]	Gasdermin	e8go8I1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Gasdermin	ECOD (v294.1)
E [auth H]	Gasdermin	e8go8H1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Gasdermin	ECOD (v294.1)
C [auth B]	Gasdermin	e8go8B1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Gasdermin	ECOD (v294.1)
A	Gasdermin	e8go8A1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Gasdermin	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
H [auth M]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
G [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
F [auth I]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
E [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
C [auth B]	2.60.40.840	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (utative)
C [auth B]	2.60.40.640	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (utative)
A	2.60.40.840	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (utative)
A	2.60.40.640	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
G [auth L], H [auth M]	Light Chain	IGKV1	Kappa	beta-arrestin-1 \| c5a anaphylatoxin chemotactic receptor 1	SAbDab (2026-04-10)
E [auth H], F [auth I]	Heavy Chain	IGHV3	-	beta-arrestin-1 \| c5a anaphylatoxin chemotactic receptor 1	SAbDab (2026-04-10)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C [auth B]	PF00339	Arrestin (or S-antigen), N-terminal domain (Arrestin_N)	Arrestin (or S-antigen), N-terminal domain	Ig-like beta-sandwich fold. Scop reports duplication with C-terminal domain.	Domain
A, C [auth B]	PF02752	Arrestin (or S-antigen), C-terminal domain (Arrestin_C)	Arrestin (or S-antigen), C-terminal domain	Ig-like beta-sandwich fold. Scop reports duplication with N-terminal domain.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
G [auth L], H [auth M]	Fab30 light chain	-	-	-
E [auth H], F [auth I]	Fab30 heavy chain	-	-	-
B [auth V], D [auth U]	C5a anaphylatoxin chemotactic receptor 1	opsonin receptor activity molecular transducer activity complement receptor activity transmembrane signaling receptor activity signaling receptor activity complement component C5a receptor activity immune receptor activity G protein-coupled receptor activity	positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus positive regulation of ERK1 and ERK2 cascade regulation of intracellular signal transduction intracellular signaling cassette signal transduction positive regulation of cellular process regulation of biological process regulation of signaling positive regulation of MAPK cascade positive regulation of intracellular signal transduction regulation of MAPK cascade regulation of response to stimulus MAPK cascade regulation of cell communication cellular process ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade positive regulation of signaling multicellular organismal process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process regulation of cytokine production cytokine production regulation of multicellular organismal process positive regulation of macromolecule metabolic process regulation of vascular endothelial growth factor production regulation of biosynthetic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression vascular endothelial growth factor production biosynthetic process positive regulation of gene expression positive regulation of multicellular organismal process positive regulation of vascular endothelial growth factor production regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process cellular component organization cell junction organization presynapse organization synapse organization cellular component organization or biogenesis immune response immune system process immune response-regulating cell surface receptor signaling pathway complement receptor mediated signaling pathway immune response-activating signaling pathway immune response-regulating signaling pathway positive regulation of immune response regulation of immune system process positive regulation of immune system process cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway regulation of immune response activation of immune response amyloid-beta clearance cell chemotaxis chemotaxis neutrophil chemotaxis response to external stimulus neutrophil migration granulocyte migration leukocyte migration cellular response to chemical stimulus taxis granulocyte chemotaxis response to chemical myeloid leukocyte migration cell migration cell motility leukocyte chemotaxis locomotion system process nervous system process cognition cell population proliferation positive regulation of cell population proliferation positive regulation of epithelial cell proliferation regulation of cell population proliferation regulation of epithelial cell proliferation epithelial cell proliferation positive regulation of locomotion regulation of cell motility positive regulation of chemotaxis positive regulation of cell migration positive regulation of neutrophil chemotaxis regulation of leukocyte chemotaxis regulation of leukocyte migration positive regulation of leukocyte chemotaxis positive regulation of granulocyte chemotaxis regulation of locomotion regulation of neutrophil chemotaxis regulation of neutrophil migration regulation of response to external stimulus regulation of granulocyte chemotaxis positive regulation of response to external stimulus positive regulation of cell motility regulation of cell migration positive regulation of leukocyte migration positive regulation of neutrophil migration regulation of chemotaxis macrophage migration regulation of mononuclear cell migration positive regulation of macrophage migration macrophage chemotaxis regulation of macrophage migration positive regulation of mononuclear cell migration regulation of macrophage chemotaxis mononuclear cell migration positive regulation of macrophage chemotaxis cellular developmental process astrocyte differentiation cell development astrocyte activation glial cell development multicellular organism development neurogenesis astrocyte development gliogenesis cell differentiation response to stress anatomical structure development system development developmental process defense response cell activation nervous system development central nervous system development glial cell differentiation glial cell activation inflammatory response neuroinflammatory response regulation of developmental process angiogenesis regulation of vasculature development positive regulation of developmental process tube morphogenesis regulation of anatomical structure morphogenesis blood vessel development regulation of multicellular organismal development blood vessel morphogenesis tube development positive regulation of angiogenesis vasculature development circulatory system development anatomical structure morphogenesis positive regulation of vasculature development regulation of angiogenesis anatomical structure formation involved in morphogenesis complement component C5a signaling pathway G protein-coupled receptor signaling pathway phospholipase C-activating G protein-coupled receptor signaling pathway mRNA transcription by RNA polymerase II RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process mRNA transcription mRNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process DNA-templated transcription nucleic acid biosynthetic process transcription by RNA polymerase II adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway adenylate cyclase-modulating G protein-coupled receptor signaling pathway cellular defense response sensory perception of chemical stimulus sensory perception biological process involved in interspecies interaction between organisms response to other organism response to oxygen-containing compound response to nitrogen compound response to biotic stimulus response to bacterium response to external biotic stimulus response to molecule of bacterial origin response to peptidoglycan myeloid leukocyte activation leukocyte activation macrophage activation leukocyte activation involved in inflammatory response microglial cell activation defense response to Gram-positive bacterium defense response to bacterium	cellular anatomical structure apical part of cell cell periphery plasma membrane membrane basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular membrane-bounded organelle endomembrane system cellular anatomical structure apical part of cell cell periphery plasma membrane membrane basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle membrane bounding membrane of organelle vesicle membrane cytoplasmic vesicle organelle secretory granule secretory vesicle cytoplasm vesicle organelle membrane secretory granule membrane
A, C [auth B]	Beta-arrestin-1	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity cysteine-type endopeptidase inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity phosphoprotein binding protein binding binding kinase binding enzyme binding enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity cysteine-type endopeptidase inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity phosphoprotein binding protein binding binding kinase binding enzyme binding protein kinase binding mitogen-activated protein kinase kinase binding arrestin family protein binding protein-containing complex binding AP-2 adaptor complex binding GTPase regulator activity enzyme activator activity GTPase activator activity molecular function activator activity nucleoside-triphosphatase regulator activity protein phosphorylated amino acid binding angiotensin receptor binding signaling receptor binding G protein-coupled receptor binding molecular adaptor activity ubiquitin protein ligase binding ubiquitin-like protein ligase binding insulin-like growth factor receptor binding clathrin binding adrenergic receptor binding alpha-1B adrenergic receptor binding transcription coactivator activity transcription regulator activity transcription coregulator activity transmembrane transporter binding alpha-1A adrenergic receptor binding cargo adaptor activity protein-macromolecule adaptor activity clathrin-cargo adaptor activity follicle-stimulating hormone receptor binding vasopressin receptor binding V2 vasopressin receptor binding transcription factor binding RNA polymerase II-specific DNA-binding transcription factor binding nuclear receptor binding DNA-binding transcription factor binding nuclear estrogen receptor binding	response to stimulus response to chemical response to xenobiotic stimulus interleukin-6 production multicellular organismal process regulation of cellular process negative regulation of biological process regulation of interleukin-6 production regulation of cytokine production cytokine production negative regulation of cellular process regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process response to stimulus response to chemical response to xenobiotic stimulus interleukin-6 production multicellular organismal process regulation of cellular process negative regulation of biological process regulation of interleukin-6 production regulation of cytokine production 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 negative regulation of cytokine production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression negative regulation of interleukin-6 production negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process negative regulation of multicellular organismal process regulation of metabolic process negative regulation of post-translational protein modification regulation of protein modification process regulation of protein ubiquitination regulation of primary metabolic process protein ubiquitination negative regulation of protein modification process protein metabolic process negative regulation of protein ubiquitination regulation of protein modification by small protein conjugation or removal protein modification process negative regulation of protein metabolic process negative regulation of protein modification by small protein conjugation or removal regulation of post-translational protein modification regulation of protein metabolic process primary metabolic process macromolecule modification post-translational protein modification protein modification by small protein conjugation protein modification by small protein conjugation or removal actomyosin structure organization actin cytoskeleton organization actin filament organization cellular component organization cellular component biogenesis organelle organization cellular component assembly actin filament bundle organization contractile actin filament bundle assembly actin filament-based process actin filament bundle assembly stress fiber assembly cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization regulation of apoptotic process apoptotic process regulation of programmed cell death cell death programmed cell death cellular response to stimulus negative adaptation of signaling pathway negative regulation of signaling signaling desensitization of G protein-coupled receptor signaling pathway regulation of signal transduction negative regulation of G protein-coupled receptor signaling pathway negative regulation of cell communication cell communication signal transduction regulation of G protein-coupled receptor signaling pathway regulation of signaling negative regulation of response to stimulus negative regulation of signal transduction regulation of response to stimulus adaptation of signaling pathway regulation of cell communication G protein-coupled receptor signaling pathway negative regulation of intracellular signal transduction intracellular signal transduction regulation of intracellular signal transduction intracellular signaling cassette regulation of MAPK cascade negative regulation of ERK1 and ERK2 cascade MAPK cascade ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade negative regulation of MAPK cascade ovulation cycle process reproductive process sex differentiation development of primary female sexual characteristics developmental process involved in reproduction ovulation cycle multicellular organism development development of primary sexual characteristics anatomical structure development reproductive structure development ovarian follicle development system development rhythmic process developmental process gonad development reproductive system development female gonad development multicellular organismal reproductive process animal organ development female sex differentiation follicle-stimulating hormone signaling pathway regulation of inositol phosphate biosynthetic process regulation of inositol trisphosphate biosynthetic process alcohol metabolic process inositol phosphate metabolic process regulation of small molecule metabolic process phosphate-containing compound metabolic process polyol biosynthetic process inositol trisphosphate metabolic process small molecule metabolic process phosphorus metabolic process regulation of carbohydrate metabolic process carbohydrate metabolic process polyol metabolic process regulation of alcohol biosynthetic process small molecule biosynthetic process inositol trisphosphate biosynthetic process carbohydrate biosynthetic process organophosphate metabolic process organophosphate biosynthetic process inositol phosphate biosynthetic process alcohol biosynthetic process regulation of phosphorus metabolic process regulation of carbohydrate biosynthetic process system process sensory perception nervous system process catabolic process protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process ubiquitin-dependent protein catabolic process RNA metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process regulation of DNA-templated transcription response to morphine response to isoquinoline alkaloid response to nitrogen compound response to alkaloid negative regulation of interleukin-8 production interleukin-8 production regulation of interleukin-8 production positive regulation of DNA-templated transcription positive regulation of biological process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process transcription by RNA polymerase II positive regulation of biosynthetic process positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of transcription by RNA polymerase II positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process import into cell receptor internalization transport vesicle-mediated transport localization G protein-coupled receptor internalization establishment of localization receptor-mediated endocytosis endocytosis positive regulation of cell communication positive regulation of signal transduction positive regulation of response to stimulus positive regulation of ERK1 and ERK2 cascade positive regulation of MAPK cascade positive regulation of intracellular signal transduction positive regulation of signaling negative regulation of programmed cell death negative regulation of apoptotic process establishment of protein localization protein transport macromolecule localization intracellular protein localization regulation of localization regulation of cellular component organization positive regulation of cellular component organization regulation of receptor internalization positive regulation of endocytosis positive regulation of receptor-mediated endocytosis regulation of endocytosis regulation of transport regulation of receptor-mediated endocytosis regulation of vesicle-mediated transport positive regulation of receptor internalization positive regulation of transport small GTPase-mediated signal transduction regulation of small GTPase mediated signal transduction Rho protein signal transduction regulation of Rho protein signal transduction positive regulation of Rho protein signal transduction positive regulation of small GTPase mediated signal transduction adenylate cyclase-modulating G protein-coupled receptor signaling pathway positive regulation of protein metabolic process positive regulation of post-translational protein modification positive regulation of protein modification process positive regulation of protein modification by small protein conjugation or removal positive regulation of protein ubiquitination neuron apoptotic process negative regulation of neuron apoptotic process regulation of neuron apoptotic process proteasomal protein catabolic process proteasome-mediated ubiquitin-dependent protein catabolic process cell surface receptor signaling pathway Notch signaling pathway negative regulation of Notch signaling pathway regulation of Notch signaling pathway cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation sensory perception of touch sensory perception of mechanical stimulus nitrogen compound transport positive regulation of establishment of protein localization carbohydrate homeostasis establishment of localization in cell positive regulation of insulin secretion involved in cellular response to glucose stimulus positive regulation of insulin secretion regulation of biological quality regulation of peptide hormone secretion regulation of hormone levels positive regulation of peptide hormone secretion establishment of protein localization to extracellular region intracellular glucose homeostasis protein secretion cellular response to oxygen-containing compound regulation of protein secretion regulation of secretion cellular response to carbohydrate stimulus chemical homeostasis response to glucose glucose homeostasis positive regulation of protein localization insulin secretion involved in cellular response to glucose stimulus cellular localization regulation of hormone secretion regulation of protein localization regulation of peptide secretion homeostatic process positive regulation of secretion by cell hormone secretion protein localization to extracellular region positive regulation of protein transport peptide secretion regulation of secretion by cell secretion by cell positive regulation of hormone secretion response to monosaccharide response to carbohydrate positive regulation of secretion signal release cellular response to hexose stimulus intracellular chemical homeostasis cellular response to monosaccharide stimulus positive regulation of peptide secretion secretion regulation of peptide transport regulation of establishment of protein localization export from cell cell-cell signaling response to oxygen-containing compound cellular response to glucose stimulus regulation of protein transport positive regulation of protein secretion peptide transport response to hexose cellular response to chemical stimulus cellular homeostasis regulation of cellular localization regulation of insulin secretion peptide hormone secretion regulation of insulin secretion involved in cellular response to glucose stimulus hormone transport insulin secretion phototransduction detection of light stimulus response to light stimulus detection of external stimulus response to external stimulus detection of abiotic stimulus detection of stimulus response to abiotic stimulus response to radiation positive regulation of phosphorylation regulation of protein phosphorylation positive regulation of phosphate metabolic process positive regulation of protein phosphorylation protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of phosphorylation	cell projection cellular anatomical structure pseudopodium plasma membrane bounded cell projection cell periphery postsynapse postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane clathrin-coated pit cell projection cellular anatomical structure pseudopodium plasma membrane bounded cell projection cell periphery postsynapse postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane clathrin-coated pit endomembrane system intracellular anatomical structure cytoplasm cytosol basal part of cell basal plasma membrane basolateral plasma membrane intracellular organelle organelle membraneless organelle intracellular membraneless organelle chromatin chromosome glutamatergic synapse neuron spine neuron projection dendritic spine somatodendritic compartment dendrite dendritic tree membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen cytoplasmic vesicle intracellular vesicle vesicle endosome postsynaptic density neuron to neuron synapse postsynaptic specialization asymmetric synapse nuclear body

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth V], D [auth U]	IPR002234	Anaphylatoxin chemotactic receptor, C3a/C5a1/C5a2	Family
B [auth V], D [auth U]	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
B [auth V], D [auth U]	IPR017452	GPCR, rhodopsin-like, 7TM	Domain
B [auth V], D [auth U]	IPR000826	Formyl peptide receptor-related	Family
A, C [auth B]	IPR011022	Arrestin-like, C-terminal domain	Domain
A, C [auth B]	IPR000698	Arrestin	Family
A, C [auth B]	IPR014753	Arrestin, N-terminal	Homologous Superfamily
A, C [auth B]	IPR014756	Immunoglobulin E-set	Homologous Superfamily
A, C [auth B]	IPR014752	Arrestin-like, C-terminal domain superfamily	Homologous Superfamily
A, C [auth B]	IPR011021	Arrestin-like, N-terminal	Domain
A, C [auth B]	IPR017864	Arrestin, conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B [auth V], D [auth U]	Pharos: P21730	toxic shock syndrome Liver Cirrhosis, Experimental MALT lymphoma osteosarcoma psoriasis adrenal cortex carcinoma B-cell chronic lymphocytic leukemia gastric cancer granulomatosis with polyangiitis invasive ductal breast carcinoma lung cancer malignant glioma ovarian cancer ulcerative colitis cutaneous lupus erythematosus toxic shock syndrome Liver Cirrhosis, Experimental MALT lymphoma osteosarcoma psoriasis adrenal cortex carcinoma B-cell chronic lymphocytic leukemia gastric cancer granulomatosis with polyangiitis invasive ductal breast carcinoma lung cancer malignant glioma ovarian cancer ulcerative colitis cutaneous lupus erythematosus gastric carcinoma IgA glomerulonephritis lung carcinoma malignant mesothelioma non-small cell lung carcinoma pilocytic astrocytoma subependymal giant cell astrocytoma atypical teratoid rhabdoid tumor glioblastoma interstitial cystitis lung adenocarcinoma malignant ependymoma

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
B [auth V], D [auth U]	SEP	Parent Component: SER RESID: AA0037 PSI-MOD : O-phospho-L-serine MOD:00046
B [auth V], D [auth U]	TPO	Parent Component: THR RESID: AA0037 , AA0038 PSI-MOD : O-phospho-L-serine MOD:00046 , O-phospho-L-threonine MOD:00047

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.