9PB3: ARP of SWI/SNF of PIC-Med-SWI/SNF

ARP of SWI/SNF of PIC-Med-SWI/SNF. Determined by electron microscopy at 4.0 Å resolution. Released 30 Sept 2026.

Method: Electron microscopy
Resolution: 4.0 Å
Organism: Saccharomyces cerevisiae
Chains: 4
Atoms: 8,029
Mol. weight: 319.13 kDa
Released: 30 Sept 2026

Explore 9PB3 in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

9PB3 contains 50 α-helices and 47 β-strands across 4 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain H: 1 helix, 0 β-strands

Element	Residues	Length	Sheet
α-helix	589-655	67

Chain J: 4 helices, 5 β-strands

Element	Residues	Length	Sheet
α-helix	3-9	7
β-strand	14	1	1
β-strand	17	1	1
β-strand	25-30	6	2
β-strand	60-65	6	2
α-helix	66	1
α-helix	81-83	3
β-strand	88	1	3
α-helix	89-101	13

Chain K: 24 helices, 22 β-strands

Element	Residues	Length	Sheet
β-strand	8-12	5	4
β-strand	17-21	5	4
β-strand	29-31	3	4
β-strand	35-40	6	5
β-strand	44-48	5	5
α-helix	51-58	8
β-strand	65-68	4	5
β-strand	71	1	6
β-strand	77	1	6
α-helix	83-92	10
β-strand	104-108	5	4
α-helix	109-111	3
α-helix	117-125	9
α-helix	126-130	5
β-strand	135-140	6	4
α-helix	141-147	7
β-strand	154-156	3	7
β-strand	159	1	8
β-strand	164	1	8
β-strand	167-170	4	7
β-strand	173-174	2	7
α-helix	175	1
α-helix	186-195	10
α-helix	198-200	3
α-helix	204-209	6
α-helix	216-223	8
α-helix	224-228	5
α-helix	229-234	6
β-strand	237	1	9
α-helix	243-270	28
α-helix	283-285	3
β-strand	287-291	5	10
β-strand	298-302	5	10
α-helix	303-311	9
α-helix	325-327	3
α-helix	329-341	13
α-helix	381-389	9
β-strand	392-393	2	7
α-helix	398-400	3
β-strand	402	1	9
α-helix	404-415	12
β-strand	423	1	7
α-helix	429-433	5
α-helix	435-444	10
β-strand	455-456	2	4
α-helix	457-463	7

Chain L: 21 helices, 20 β-strands

Element	Residues	Length	Sheet
α-helix	6-8	3
β-strand	10-13	4	3
β-strand	18-23	6	3
α-helix	31-33	3
β-strand	35-38	4	3
β-strand	41-43	3	11
β-strand	53-54	2	11
α-helix	58-60	3
β-strand	63-65	3	11
β-strand	68	1	12
β-strand	73	1	12
α-helix	78-97	20
α-helix	101-104	4
β-strand	113-115	3	13
α-helix	121-133	13
β-strand	139-140	2	14
β-strand	142-144	3	13
α-helix	145-152	8
β-strand	159-164	6	15
β-strand	169-175	7	15
β-strand	178-179	2	15
α-helix	181-183	3
β-strand	185-187	3	15
α-helix	192-201	10
α-helix	207-215	9
α-helix	224-227	4
β-strand	282-285	4	16
β-strand	291-294	4	16
α-helix	296-298	3
α-helix	312-316	5
α-helix	323-330	8
β-strand	333-337	5	15
α-helix	338-341	4
α-helix	345-354	10
α-helix	363-375	13
α-helix	396-399	4
β-strand	409	1	15
α-helix	428-440	13
β-strand	449-450	2	14
α-helix	451-457	7
α-helix	458-464	7

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Transcription regulatory protein SNF2	H	protein	1703	Saccharomyces cerevisiae	P22082 (AlphaFold model)
Regulator of Ty1 transposition protein 102	J	protein	157	Saccharomyces cerevisiae	P53330 (AlphaFold model)
Actin-related protein 7	K	protein	477	Saccharomyces cerevisiae	Q12406 (AlphaFold model)
Actin-like protein ARP9	L	protein	467	Saccharomyces cerevisiae	Q05123 (AlphaFold model)

Sequence of entity 1 (H), FASTA

>9PB3_1 Transcription regulatory protein SNF2 (chains H)
MNIPQRQFSNEEVNRCYLRWQHLRNEHGMNAPSVPEFIYLTKVLQFAAKQRQELQMQRQQ
QGISGSQQNIVPNSSDQAELPNNASSHISASASPHLAPNMQLNGNETFSTSAHQSPIMQT
QMPLNSNGGNNMLPQRQSSVGSLNATNFSPTPANNGENAAEKPDNSNHNNLNLNNSELQP
QNRSLQEHNIQDSNVMPGSQINSPMPQQAQMQQAQFQAQQAQQAQQAQQAQQAQARLQQG
RRLPMTMFTAEQSELLKAQITSLKCLVNRKPIPFEFQAVIQKSINHPPDFKRMLLSLSEF
ARRRQPTDQNNQSNLNGGNNTQQPGTNSHYNNTNTDNVSGLTRNAPLDSKDENFASVSPA
GPSSVHNAKNGTLDKNSQTVSGTPITQTESKKEENETISNVAKTAPNSNKTHTEQNNPPK
PQKPVPLNVLQDQYKEGIKVVDIDDPDMMVDSFTMPNISHSNIDYQTLLANSDHAKFTIE
PGVLPVGIDTHTATDIYQTLIALNLDTTVNDCLDKLLNDECTESTRENALYDYYALQLLP
LQKAVRGHVLQFEWHQNSLLTNTHPNFLSKIRNINVQDALLTNQLYKNHELLKLERKKTE
AVARLKSMNKSAINQYNRRQDKKNKRLKFGHRLIATHTNLERDEQKRAEKKAKERLQALK
ANDEEAYIKLLDQTKDTRITHLLRQTNAFLDSLTRAVKDQQKYTKEMIDSHIKEASEEVD
DLSMVPKMKDEEYDDDDDNSNVDYYNVAHRIKEDIKKQPSILVGGTLKDYQIKGLQWMVS
LFNNHLNGILADEMGLGKTIQTISLLTYLYEMKNIRGPYLVIVPLSTLSNWSSEFAKWAP
TLRTISFKGSPNERKAKQAKIRAGEFDVVLTTFEYIIKERALLSKVKWVHMIIDEGHRMK
NAQSKLSLTLNTHYHADYRLILTGTPLQNNLPELWALLNFVLPKIFNSVKSFDEWFNTPF
ANTGGQDKIELSEEETLLVIRRLHKVLRPFLLRRLKKDVEKELPDKVEKVVKCKMSALQQ
IMYQQMLKYRRLFIGDQNNKKMVGLRGFNNQIMQLKKICNHPFVFEEVEDQINPTRETND
DIWRVAGKFELLDRILPKLKATGHRVLIFFQMTQIMDIMEDFLRYINIKYLRLDGHTKSD
ERSELLRLFNAPDSEYLCFILSTRAGGLGLNLQTADTVIIFDTDWNPHQDLQAQDRAHRI
GQKNEVRILRLITTNSVEEVILERAYKKLDIDGKVIQAGKFDNKSTSEEQEALLRSLLDA
EEERRKKRESGVEEEEELKDSEINEILARNDEEMAVLTRMDEDRSKKEEELGVKSRLLEK
SELPDIYSRDIGAELKREESESAAVYNGRGARERKTATYNDNMSEEQWLRQFEVSDDEKN
DKQARKQRTKKEDKSEAIDGNGEIKGENIDADNDGPRINNISAEDRADTDLAMNDDDFLS
KKRKAGRPRGRPKKVKLEGSENSEPPALESSPVTGDNSPSEDFMDIPKPRTAGKTSVKSA
RTSTRGRGRGRGRGRGRGRGRGRPPKARNGLDYVRTPAAATSPIDIREKVAKQALDLYHF
ALNYENEAGRKLSDIFLSKPSKALYPDYYMIIKYPVAFDNINTHIETLAYNSLKETLQDF
HLIFSNARIYNTEGSVVYEDSLELEKVVTKKYCEIMGDNSQLDFTEFDEQYGTRPLVLPP
VVTSSVAESFTDEADSSMTEASV

Sequence of entity 2 (J), FASTA

>9PB3_2 Regulator of Ty1 transposition protein 102 (chains J)
MDPQTLITKANKVSYYGNPTSKESWRYDWYQPSKVSSNVQQPQQQLGDMENNLEKYPFRY
KTWLRNQEDEKNLQRESCEDILDLKEFDRRILKKSLMTSHTKGDTSKATGAPSANQGDEA
LSVDDIRGAVGNSEAIPGLSAGVNNDNTKESKDVKMN

Sequence of entity 3 (K), FASTA

>9PB3_3 Actin-related protein 7 (chains K)
MTLNRKCVVIHNGSHRTVAGFSNVELPQCIIPSSYIKRTDEGGEAEFIFGTYNMIDAAAE
KRNGDEVYTLVDSQGLPYNWDALEMQWRYLYDTQLKVSPEELPLVITMPATNGKPDMAIL
ERYYELAFDKLNVPVFQIVIEPLAIALSMGKSSAFVIDIGASGCNVTPIIDGIVVKNAVV
RSKFGGDFLDFQVHERLAPLIKEENDMENMADEQKRSTDVWYEASTWIQQFKSTMLQVSE
KDLFELERYYKEQADIYAKQQEQLKQMDQQLQYTALTGSPNNPLVQKKNFLFKPLNKTLT
LDLKECYQFAEYLFKPQLISDKFSPEDGLGPLMAKSVKKAGASINSMKANTSTNPNGLGT
SHINTNVGDNNSTASSSNISPEQVYSLLLTNVIITGSTSLIEGMEQRIIKELSIRFPQYK
LTTFANQVMMDRKIQGWLGALTMANLPSWSLGKWYSKEDYETLKRDRKQSQATNATN

Sequence of entity 4 (L), FASTA

>9PB3_4 Actin-like protein ARP9 (chains L)
MAPFRQDSILIIYPRSQTTLVQFGLNEETFTVPELEIPTQIYRTTRQDGSYTYHSTNKDN
KAELIKPIQNGEIIDISAFTQFLRLIFVSILSDRANKNQDAFEAELSNIPLLLITHHSWS
QSDLEIITQYVFESLEINNLIQLPASLAATYSMISLQNCCIIDVGTHHTDIIPIVDYAQL
DHLVSSIPMGGQSINDSLKKLLPQWDDDQIESLKKSPIFEVLSDDAKKLSSFDFGNENED
EDEGTLNVAEIITSGRDTREVLEERERGQKVKNVKNSDLEFNTFWDEKGNEIKVGKQRFQ
GCNNLIKNISNRVGLTLDNIDDINKAKAVWENIIIVGGTTSISGFKEALLGQLLKDHLII
EPEEEKSKREEEAKSVLPAATKKKSKFMTNSTAFVPTIEYVQCPTVIKLAKYPDYFPEWK
KSGYSEIIFLGAQIVSKQIFTHPKDTFYITREKYNMKGPAALWDVQF

Primary citation

Structure of ARP of SWI/SNF of PIC-Med-SWI/SNF. Yang, C., Nagai, S., Chen, D.-H. To be published.

Other PDB entries of the same protein (UniProt P22082 (AlphaFold model), which also has an AlphaFold model), best resolution first:

7VRC 2.15 Å, Structure of the Yeast SNF11/SNF2 complex
4I6M 2.8 Å, Structure of Arp7-Arp9-Snf2(HSA)-RTT102 subcomplex of SWI/SNF chromatin remodeler.
7C4J 2.89 Å, Cryo-EM structure of the yeast Swi/Snf complex in a nucleosome free state
6IY2 3.47 Å, Structure of Snf2-MMTV-A nucleosome complex at shl2 in ADP state
7EGM 3.6 Å, The SRM module of SWI/SNF-nucleosome complex
5Z3O 3.62 Å, Structure of Snf2-nucleosome complex in ADP state
6IY3 3.67 Å, Structure of Snf2-MMTV-A nucleosome complex at shl-2 in ADP state
5X0X 3.97 Å, Complex of Snf2-Nucleosome complex with Snf2 bound to position +6 of the nucleosome
5Z3V 4.22 Å, Structure of Snf2-nucleosome complex at shl-2 in ADP BeFx state
5Z3L 4.31 Å, Structure of Snf2-nucleosome complex in apo state
5Z3U 4.31 Å, Structure of Snf2-nucleosome complex at shl2 in ADP BeFx state
5X0Y 4.69 Å, Complex of Snf2-Nucleosome complex with Snf2 bound to SHL2 of the nucleosome

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