8K5O | pdb_00008k5o

Cryo-EM structure of the RC-LH core comples from Halorhodospira halochloris

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
Z [auth 1]	DNA_topoisoIV	e8k5o11	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
XA [auth i]	DNA_topoisoIV	e8k5oi1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
W [auth u]	DNA_topoisoIV	e8k5ou1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
UA [auth f]	DNA_topoisoIV	e8k5of1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
T [auth o]	DNA_topoisoIV	e8k5oo1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
RA [auth W]	DNA_topoisoIV	e8k5oW1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
Q [auth l]	DNA_topoisoIV	e8k5ol1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
OA [auth T]	DNA_topoisoIV	e8k5oT1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
N [auth c]	DNA_topoisoIV	e8k5oc1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
LA [auth Q]	DNA_topoisoIV	e8k5oQ1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
K [auth Z]	DNA_topoisoIV	e8k5oZ1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
IA [auth N]	DNA_topoisoIV	e8k5oN1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
H [auth x]	CYNS_N	e8k5ox01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: CYNS_N	ECOD (v294.2)
FA [auth G]	DNA_topoisoIV	e8k5oG1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
CA [auth 7]	DNA_topoisoIV	e8k5o71	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
AB [auth r]	DNA_topoisoIV	e8k5or1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
ZA [auth q]	DNA_topoisoIV	e8k5oq1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
Y [auth z]	DNA_topoisoIV	e8k5oz1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
WA [auth h]	DNA_topoisoIV	e8k5oh1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
V [auth t]	DNA_topoisoIV	e8k5ot1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
TA [auth e]	DNA_topoisoIV	e8k5oe1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
S [auth n]	DNA_topoisoIV	e8k5on1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
QA [auth V]	DNA_topoisoIV	e8k5oV1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
P [auth k]	DNA_topoisoIV	e8k5ok1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
NA [auth S]	DNA_topoisoIV	e8k5oS1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
M [auth b]	DNA_topoisoIV	e8k5ob1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
KA [auth P]	DNA_topoisoIV	e8k5oP1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
J [auth Y]	DNA_topoisoIV	e8k5oY1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
HA [auth K]	DNA_topoisoIV	e8k5oK1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
G [auth w]	CYNS_N	e8k5ow01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: CYNS_N	ECOD (v294.2)
EA [auth F]	DNA_topoisoIV	e8k5oF1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
BA [auth 6]	DNA_topoisoIV	e8k5o61	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
F [auth 3]	CYNS_N	e8k5o301	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: CYNS_N	ECOD (v294.2)
E [auth 4]	CYNS_N	e8k5o401	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: CYNS_N	ECOD (v294.2)
D [auth H]	CYNS_N	e8k5oH01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: CYNS_N	ECOD (v294.2)
C [auth M]	CYNS_N	e8k5oM01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: CYNS_N	ECOD (v294.2)
B [auth L]	CYNS_N	e8k5oL01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: CYNS_N	ECOD (v294.2)
A [auth C]	CYNS_N	e8k5oC01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: CYNS_N	ECOD (v294.2)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
AB [auth r], CA [auth 7], FA [auth G], H [auth x], IA [auth N], AB [auth r], CA [auth 7], FA [auth G], H [auth x], IA [auth N], K [auth Z], LA [auth Q], N [auth c], OA [auth T], Q [auth l], RA [auth W], T [auth o], UA [auth f], W [auth u], XA [auth i], Z [auth 1]	PF00556	Antenna complex alpha/beta subunit (LHC)	Antenna complex alpha/beta subunit		Domain
BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], KA [auth P], M [auth b], NA [auth S], P [auth k], QA [auth V], S [auth n], TA [auth e], V [auth t], WA [auth h], Y [auth z], ZA [auth q]	PF00556	Antenna complex alpha/beta subunit (LHC)	Antenna complex alpha/beta subunit		Domain
F [auth 3]	PF00556	Antenna complex alpha/beta subunit (LHC)	Antenna complex alpha/beta subunit		Domain
E [auth 4]	PF00556	Antenna complex alpha/beta subunit (LHC)	Antenna complex alpha/beta subunit		Domain
D [auth H]	PF00556	Antenna complex alpha/beta subunit (LHC)	Antenna complex alpha/beta subunit		Domain
D [auth H]	PF03967	Photosynthetic reaction centre, H-chain N-terminal region (PRCH)	Photosynthetic reaction centre, H-chain N-terminal region	-	Family
D [auth H]	PF05239	PRC-barrel domain (PRC)	PRC-barrel domain	The PRC-barrel is an all beta barrel domain found in photosystem reaction centre subunit H of the purple bacteria and RNA metabolism proteins of the RimM group. PRC-barrels are approximately 80 residues long, and found widely represented in bacteria, ...	The PRC-barrel is an all beta barrel domain found in photosystem reaction centre subunit H of the purple bacteria and RNA metabolism proteins of the RimM group. PRC-barrels are approximately 80 residues long, and found widely represented in bacteria, archaea and plants. This domain is also present at the carboxyl terminus of the pan-bacterial protein RimM, which is involved in ribosomal maturation and processing of 16S rRNA. A family of small proteins conserved in all known euryarchaea are composed entirely of a single stand-alone copy of the domain [1].	Domain
C [auth M]	PF00124	Photosynthetic reaction centre protein (Photo_RC)	Photosynthetic reaction centre protein	-	Family
B [auth L]	PF00124	Photosynthetic reaction centre protein (Photo_RC)	Photosynthetic reaction centre protein	-	Family
A [auth C]	PF02276	Photosynthetic reaction centre cytochrome C subunit (CytoC_RC)	Photosynthetic reaction centre cytochrome C subunit	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
AA [auth y], BB [auth p], DA [auth 5], GA [auth 8], I [auth v], AA [auth y], BB [auth p], DA [auth 5], GA [auth 8], I [auth v], JA [auth I], L [auth X], MA [auth O], O [auth a], PA [auth R], R [auth j], SA [auth U], U [auth m], VA [auth d], X [auth s], YA [auth g]	Gamma subunit of light-harvesting 1	-	-	-
AB [auth r], CA [auth 7], FA [auth G], H [auth x], IA [auth N], AB [auth r], CA [auth 7], FA [auth G], H [auth x], IA [auth N], K [auth Z], LA [auth Q], N [auth c], OA [auth T], Q [auth l], RA [auth W], T [auth o], UA [auth f], W [auth u], XA [auth i], Z [auth 1]	Beta subunit of light-harvesting 1	chlorophyll binding binding bacteriochlorophyll binding tetrapyrrole binding cation binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction metabolic process cellular process generation of precursor metabolites and energy	cell periphery cellular anatomical structure plasma membrane membrane membrane-bounded organelle plasma membrane light-harvesting complex protein-containing complex intracellular anatomical structure intracellular vesicle plasma membrane-derived chromatophore light-harvesting complex intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle cell periphery cellular anatomical structure plasma membrane membrane membrane-bounded organelle plasma membrane light-harvesting complex protein-containing complex intracellular anatomical structure intracellular vesicle plasma membrane-derived chromatophore light-harvesting complex intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle organelle cytoplasm vesicle
BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], KA [auth P], M [auth b], NA [auth S], P [auth k], QA [auth V], S [auth n], TA [auth e], V [auth t], WA [auth h], Y [auth z], ZA [auth q]	Antenna complex alpha/beta subunit domain-containing protein	chlorophyll binding binding bacteriochlorophyll binding tetrapyrrole binding cation binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction metabolic process cellular process generation of precursor metabolites and energy	membrane-bounded organelle intracellular organelle organelle envelope organelle inner membrane cellular anatomical structure intracellular anatomical structure organelle membrane organelle membrane cell periphery plasma membrane plasma membrane light-harvesting complex protein-containing complex intracellular vesicle membrane-bounded organelle intracellular organelle organelle envelope organelle inner membrane cellular anatomical structure intracellular anatomical structure organelle membrane organelle membrane cell periphery plasma membrane plasma membrane light-harvesting complex protein-containing complex intracellular vesicle plasma membrane-derived chromatophore light-harvesting complex intracellular membrane-bounded organelle cytoplasmic vesicle cytoplasm vesicle
F [auth 3]	Light-harvesting LHI	chlorophyll binding binding bacteriochlorophyll binding tetrapyrrole binding cation binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction metabolic process cellular process generation of precursor metabolites and energy	membrane-bounded organelle intracellular organelle organelle envelope organelle inner membrane cellular anatomical structure intracellular anatomical structure organelle membrane organelle membrane cell periphery plasma membrane plasma membrane light-harvesting complex protein-containing complex intracellular vesicle membrane-bounded organelle intracellular organelle organelle envelope organelle inner membrane cellular anatomical structure intracellular anatomical structure organelle membrane organelle membrane cell periphery plasma membrane plasma membrane light-harvesting complex protein-containing complex intracellular vesicle plasma membrane-derived chromatophore light-harvesting complex intracellular membrane-bounded organelle cytoplasmic vesicle cytoplasm vesicle
E [auth 4]	Antenna complex alpha/beta subunit domain-containing protein	chlorophyll binding binding bacteriochlorophyll binding tetrapyrrole binding cation binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction metabolic process cellular process generation of precursor metabolites and energy	cell periphery cellular anatomical structure plasma membrane membrane membrane-bounded organelle plasma membrane light-harvesting complex protein-containing complex intracellular anatomical structure intracellular vesicle plasma membrane-derived chromatophore light-harvesting complex intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle cell periphery cellular anatomical structure plasma membrane membrane membrane-bounded organelle plasma membrane light-harvesting complex protein-containing complex intracellular anatomical structure intracellular vesicle plasma membrane-derived chromatophore light-harvesting complex intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle organelle cytoplasm vesicle
D [auth H]	Photosynthetic reaction center H subunit	-	photosynthesis photosynthesis, light reaction metabolic process cellular process generation of precursor metabolites and energy	membrane-bounded organelle plasma membrane light-harvesting complex protein-containing complex intracellular anatomical structure intracellular vesicle plasma membrane-derived chromatophore light-harvesting complex intracellular membrane-bounded organelle intracellular organelle cellular anatomical structure cytoplasmic vesicle organelle cytoplasm vesicle
C [auth M]	Reaction center protein M chain	chlorophyll binding binding bacteriochlorophyll binding tetrapyrrole binding cation binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction photosynthetic electron transport chain electron transport chain photosynthetic electron transport in photosystem II metabolic process cellular process generation of precursor metabolites and energy	cellular anatomical structure endomembrane system intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane intracellular membraneless organelle plasma membrane-derived chromatophore intracellular organelle organelle membraneless organelle cytoplasm photosynthetic membrane thylakoid membrane-bounded organelle cellular anatomical structure endomembrane system intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane intracellular membraneless organelle plasma membrane-derived chromatophore intracellular organelle organelle membraneless organelle cytoplasm photosynthetic membrane thylakoid membrane-bounded organelle plasma membrane light-harvesting complex protein-containing complex intracellular vesicle light-harvesting complex intracellular membrane-bounded organelle cytoplasmic vesicle vesicle
B [auth L]	Reaction center protein L chain	chlorophyll binding binding bacteriochlorophyll binding tetrapyrrole binding cation binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction photosynthetic electron transport chain electron transport chain photosynthetic electron transport in photosystem II metabolic process cellular process generation of precursor metabolites and energy	cellular anatomical structure endomembrane system membrane-bounded organelle plasma membrane light-harvesting complex protein-containing complex intracellular anatomical structure intracellular vesicle plasma membrane-derived chromatophore light-harvesting complex intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle organelle cytoplasm cellular anatomical structure endomembrane system membrane-bounded organelle plasma membrane light-harvesting complex protein-containing complex intracellular anatomical structure intracellular vesicle plasma membrane-derived chromatophore light-harvesting complex intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle organelle cytoplasm vesicle
DB [auth 9]	reactin center small polypeptide	-	-	-
CB [auth 2]	reaction center small polypeptide	-	-	-
A [auth C]	Photosynthetic reaction center cytochrome c subunit	binding tetrapyrrole binding heme binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction metabolic process cellular process generation of precursor metabolites and energy	membrane-bounded organelle plasma membrane light-harvesting complex protein-containing complex intracellular anatomical structure intracellular vesicle plasma membrane-derived chromatophore light-harvesting complex intracellular membrane-bounded organelle intracellular organelle cellular anatomical structure cytoplasmic vesicle organelle cytoplasm vesicle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
AB [auth r], CA [auth 7], FA [auth G], H [auth x], IA [auth N], AB [auth r], CA [auth 7], FA [auth G], H [auth x], IA [auth N], K [auth Z], LA [auth Q], N [auth c], OA [auth T], Q [auth l], RA [auth W], T [auth o], UA [auth f], W [auth u], XA [auth i], Z [auth 1]	IPR023624	Antenna complex, beta domain superfamily	Homologous Superfamily
AB [auth r], CA [auth 7], FA [auth G], H [auth x], IA [auth N], AB [auth r], CA [auth 7], FA [auth G], H [auth x], IA [auth N], K [auth Z], LA [auth Q], N [auth c], OA [auth T], Q [auth l], RA [auth W], T [auth o], UA [auth f], W [auth u], XA [auth i], Z [auth 1]	IPR035889	Light-harvesting complex	Homologous Superfamily
AB [auth r], CA [auth 7], FA [auth G], H [auth x], IA [auth N], AB [auth r], CA [auth 7], FA [auth G], H [auth x], IA [auth N], K [auth Z], LA [auth Q], N [auth c], OA [auth T], Q [auth l], RA [auth W], T [auth o], UA [auth f], W [auth u], XA [auth i], Z [auth 1]	IPR002362	Light-harvesting protein B beta chain	Family
BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], KA [auth P], M [auth b], NA [auth S], P [auth k], QA [auth V], S [auth n], TA [auth e], V [auth t], WA [auth h], Y [auth z], ZA [auth q]	IPR000066	Antenna complex, alpha/beta subunit	Domain
BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], KA [auth P], M [auth b], NA [auth S], P [auth k], QA [auth V], S [auth n], TA [auth e], V [auth t], WA [auth h], Y [auth z], ZA [auth q]	IPR018332	Antenna complex, alpha subunit	Family
BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], KA [auth P], M [auth b], NA [auth S], P [auth k], QA [auth V], S [auth n], TA [auth e], V [auth t], WA [auth h], Y [auth z], ZA [auth q]	IPR002361	Antenna complex, alpha subunit conserved site	Conserved Site
BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], BA [auth 6], EA [auth F], G [auth w], HA [auth K], J [auth Y], KA [auth P], M [auth b], NA [auth S], P [auth k], QA [auth V], S [auth n], TA [auth e], V [auth t], WA [auth h], Y [auth z], ZA [auth q]	IPR035889	Light-harvesting complex	Homologous Superfamily
F [auth 3]	IPR000066	Antenna complex, alpha/beta subunit	Domain
F [auth 3]	IPR018332	Antenna complex, alpha subunit	Family
F [auth 3]	IPR002361	Antenna complex, alpha subunit conserved site	Conserved Site
F [auth 3]	IPR035889	Light-harvesting complex	Homologous Superfamily
E [auth 4]	IPR000066	Antenna complex, alpha/beta subunit	Domain
E [auth 4]	IPR023624	Antenna complex, beta domain superfamily	Homologous Superfamily
E [auth 4]	IPR035889	Light-harvesting complex	Homologous Superfamily
E [auth 4]	IPR023623	Antenna complex, beta subunit, conserved site	Conserved Site
E [auth 4]	IPR002362	Light-harvesting protein B beta chain	Family
D [auth H]	IPR014747	Bacterial photosynthetic reaction centre, H-chain, C-terminal	Homologous Superfamily
D [auth H]	IPR015810	Photosynthetic reaction centre, H subunit, N-terminal	Domain
D [auth H]	IPR005652	Photosynthetic reaction centre, H subunit	Family
D [auth H]	IPR037097	Photosynthetic reaction centre, H subunit, N-terminal domain superfamily	Homologous Superfamily
D [auth H]	IPR011033	PRC-barrel-like superfamily	Homologous Superfamily
D [auth H]	IPR027275	PRC-barrel domain	Domain
C [auth M]	IPR036854	Photosystem II protein D1/D2 superfamily	Homologous Superfamily
C [auth M]	IPR005781	Photosynthetic reaction centre, M subunit	Family
C [auth M]	IPR000484	Photosynthetic reaction centre, L/M	Family
C [auth M]	IPR055265	Photosynthetic reaction centre, L/M, conserved site	Conserved Site
B [auth L]	IPR036854	Photosystem II protein D1/D2 superfamily	Homologous Superfamily
B [auth L]	IPR000484	Photosynthetic reaction centre, L/M	Family
B [auth L]	IPR005871	Photosynthetic reaction centre, L subunit	Family
A [auth C]	IPR036280	Multiheme cytochrome superfamily	Homologous Superfamily
A [auth C]	IPR023119	Multihaem cytochrome, PRC subunit superfamily	Homologous Superfamily
A [auth C]	IPR003158	Photosynthetic reaction centre, cytochrome c subunit	Family

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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.