SAXSdb — 7b92

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Splicing factor 3B subunit 3

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	Splicing factor 3B subunit 5 × 1 （Q9BWJ5） Splicing factor 3B subunit 1 × 1 （O75533） PHD finger-like domain-containing protein 5A × 1 （Q7RTV0） ZINC ION × 3 ;[(~{Z},2~{S})-5-[[4-[(2~{E},4~{E})-3-methyl-5-[(2~{S},4~{R})-4,6,6-trimethyl-4-oxidanyl-oxan-2-yl]penta-2,4-dienyl]cyclohexyl]amino]-5-oxidanylidene-pent-3-en-2-yl] ~{N}-methylcarbamate ; × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SF3B3_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 11–452； UniProt 1–442 Author chain A； PDBConstruct 460–890； UniProt 768–1216

Splicing factor 3B subunit 5

Homo sapiens

UniProt Q9BWJ5

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	Splicing factor 3B subunit 3 × 1 （Q15393） Splicing factor 3B subunit 1 × 1 （O75533） PHD finger-like domain-containing protein 5A × 1 （Q7RTV0） ZINC ION × 3 ;[(~{Z},2~{S})-5-[[4-[(2~{E},4~{E})-3-methyl-5-[(2~{S},4~{R})-4,6,6-trimethyl-4-oxidanyl-oxan-2-yl]penta-2,4-dienyl]cyclohexyl]amino]-5-oxidanylidene-pent-3-en-2-yl] ~{N}-methylcarbamate ; × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SF3B5_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–86； UniProt 1–86

Splicing factor 3B subunit 1

Homo sapiens

UniProt O75533

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	Splicing factor 3B subunit 3 × 1 （Q15393） Splicing factor 3B subunit 5 × 1 （Q9BWJ5） PHD finger-like domain-containing protein 5A × 1 （Q7RTV0） ZINC ION × 3 ;[(~{Z},2~{S})-5-[[4-[(2~{E},4~{E})-3-methyl-5-[(2~{S},4~{R})-4,6,6-trimethyl-4-oxidanyl-oxan-2-yl]penta-2,4-dienyl]cyclohexyl]amino]-5-oxidanylidene-pent-3-en-2-yl] ~{N}-methylcarbamate ; × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SF3B1_HUMAN
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–852； UniProt 453–1304

PHD finger-like domain-containing protein 5A

Homo sapiens

UniProt Q7RTV0

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	Splicing factor 3B subunit 3 × 1 （Q15393） Splicing factor 3B subunit 5 × 1 （Q9BWJ5） Splicing factor 3B subunit 1 × 1 （O75533） ZINC ION × 3 ;[(~{Z},2~{S})-5-[[4-[(2~{E},4~{E})-3-methyl-5-[(2~{S},4~{R})-4,6,6-trimethyl-4-oxidanyl-oxan-2-yl]penta-2,4-dienyl]cyclohexyl]amino]-5-oxidanylidene-pent-3-en-2-yl] ~{N}-methylcarbamate ; × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PHF5A_HUMAN
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain D； PDBConstruct 11–108； UniProt 1–98

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	7b92
Deposition date deposition_date	2020-12-14
Structure title title	Structure of a minimal SF3B core in complex with sudemycin D6 (form II)
Keywords keywords	SF3B, pre-mRNA splicing, splicing modulator, sudemycin D6, SPLICING; SPLICING
Experimental Method method	X-RAY DIFFRACTION

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

7b92__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

7b92__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

7b92__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	40.23 Å
Rg (electron density)	39.75 Å
Total Rg	40.11 Å
Atom count	14791
Residues	1862
Excluded volume	265130 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`7b92__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (7)

Entity 1 Entity 1 polymer

Description description	Splicing factor 3B subunit 3
Molecular weight formula_weight	100722.1 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	14792

GAEFKGLRRHMFLYNLTLQRATGISFAIHGNFSGTKQQEIVVSRGKILELLRPDPNTGKVHTLLTVEVFGVIRSLMAFRLTGGTKDYIVVGSDSGRIVILEYQPSKNMFEKIHQETFGKSGCRRIVPGQFLAVDPKGRAVMISAIEKQKLVYILNRDAAARLTISSPLEAHKANTLVYHVVGVDVGFENPMFACLEMDYEEADNDPTGEAAANTQQTLTFYELDLGLNHVVRKYSEPLEEHGNFLITVPGGSDGPSGVLICSENYITYKNFGDQPDIRCPIPRRRNDLDDPERGMIFVCSATHKTKSMFFFLAQTEQGDIFKITLETDEDMVTEIRLKYFDTVPVAAAMCVLKTGFLFVASEFGNHYLYQIAHLGDDDEEPEFSSAMPLEEGDTFFFQPRPLKNLVLVDELDSLSPILFCQIADLANEDTPQLYVACGRGPRSSLRVLRHGLGGNGNSGEKLGAVFNQVAFPLQYTPRKFVIHPESNNLIIIETDHNAYTEATKAQRKQQMAEEMVEAAGEDERELAAEMAAAFLNENLPESIFGAPKAGNGQWASVIRVMNPIQGNTLDLVQLEQNEAAFSVAVCRFSNTGEDWYVLVGVAKDLILNPRSVAGGFVYTYKLVNNGEKLEFLHKTPVEEVPAAIAPFQGRVLIGVGKLLRVYDLGKKKLLRKCENKHIANYISGIQTIGHRVIVSDVQESFIWVRYKRNENQLIIFADDTYPRWVTTASLLDYDTVAGADKFGNICVVRLPPNTNDEVDSQKAEVIMNYHVGETVLSLQKTTLIPGGSESLVYTTLSGGIGILVPFTSHEDHDFFQHVEMHLRSEHPPLCGRDHLSFRSYYFPVKNVIDGDLCEQFNSMEPNKQKNVSEELDRTPPEVSKKLEDIRTRYAFDYKDDDDK

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Trichoplusia ni

Entity 2 Entity 2 polymer

Description description	Splicing factor 3B subunit 5
Molecular weight formula_weight	10149.4 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

MTDRYTIHSQLEHLQSKYIGTGHADTTKWEWLVNQHRDSYCSYMGHFDLLNYFAIAENESKARVRFNLMEKMLQPCGPPADKPEEN

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Trichoplusia ni

Entity 3 Entity 3 polymer

Description description	Splicing factor 3B subunit 1
Molecular weight formula_weight	96615.7 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MKSVNDQPSGNLPFLKPDDIQYFDKLLVDVDESTLSPEEQKERKIMKLLLKIKNGTPPMRKAALRQITDKAREFGAGPLFNQILPLLMSPTLEDQERHLLVKVIDRILYKLDDLVRPYVHKILVVIEPLLIDEDYYARVEGREIISNLAKAAGLATMISTMRPDIDNMDEYVRNTTARAFAVVASALGIPSLLPFLKAVCKSKKSWQARHTGIKIVQQIAILMGCAILPHLRSLVEIIEHGLVDEQQKVRTISALAIAALAEAATPYGIESFDSVLKPLWKGIRQHRGKGLAAFLKAIGYLIPLMDAEYANYYTREVMLILIREFQSPDEEMKKIVLKVVKQCCGTDGVEANYIKTEILPPFFKHFWQHRMALDRRNYRQLVDTTVELANKVGAAEIISRIVDDLKDEAEQYRKMVMETIEKIMGNLGAADIDHKLEEQLIDGILYAFQEQTTEDSVMLNGFGTVVNALGKRVKPYLPQICGTVLWRLNNKSAKVRQQAADLISRTAVVMKTCQEEKLMGHLGVVLYEYLGEEYPEVLGSILGALKAIVNVIGMHKMTPPIKDLLPRLTPILKNRHEKVQENCIDLVGRIADRGAEYVSAREWMRICFELLELLKAHKKAIRRATVNTFGYIAKAIGPHDVLATLLNNLKVQERQNRVCTTVAIAIVAETCSPFTVLPALMNEYRVPELNVQNGVLKSLSFLFEYIGEMGKDYIYAVTPLLEDALMDRDLVHRQTASAVVQHMSLGVYGFGCEDSLNHLLNYVWPNVFETSPHVIQAVMGALEGLRVAIGPCRMLQYCLQGLFHPARKVRDVYWKIYNSIYIGSQDALIAHYPRIYNDDKNTYIRYELDYIL

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Trichoplusia ni

Entity 4 Entity 4 polymer

Description description	PHD finger-like domain-containing protein 5A
Molecular weight formula_weight	11670.5 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

GPLGSPGSRAMAKHHPDLIFCRKQAGVAIGRLCEKCDGKCVICDSYVRPCTLVRICDECNYGSYQGRCVICGGPGVSDAYYCKECTIQEKDRDGCPKIVNLGSSKTDL

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Trichoplusia ni

Entity 5 Entity 5 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 6 Entity 6 non-polymer

Description description	;[(~{Z},2~{S})-5-[[4-[(2~{E},4~{E})-3-methyl-5-[(2~{S},4~{R})-4,6,6-trimethyl-4-oxidanyl-oxan-2-yl]penta-2,4-dienyl]cyclohexyl]amino]-5-oxidanylidene-pent-3-en-2-yl] ~{N}-methylcarbamate ;
Molecular weight formula_weight	476.6 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 7 Entity 7 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	1

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	7b92A01
Class class	2 — Mainly Beta
Architecture architecture	130 — 7 Propeller
Topology topology	10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily	10 — YVTN repeat-like/Quinoprotein amine dehydrogenase

Domain ID domain_id	7b92A02
Class class	2 — Mainly Beta
Architecture architecture	130 — 7 Propeller
Topology topology	10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily	10 — YVTN repeat-like/Quinoprotein amine dehydrogenase

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Unit-cell length a length_a	107.429 Å
Unit-cell length b length_b	107.429 Å
Unit-cell length c length_c	361.474 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	6

Space group space_group	P 32 2 1
Space-group number int_tables_number	154
Crystal system crystal_system	trigonal

Resolution resolution	3.000 Å
Low-resolution limit resolution_low	46.520 Å
R factor r_factor	0.2251
R_work r_work	0.2234
R_free r_free	0.2583

Structure of a minimal SF3B core in complex with sudemycin D6 (form II)

1. Protein Identity and Related Structures Protein Identity & Related Structures

Splicing factor 3B subunit 3

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Splicing factor 3B subunit 5

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Splicing factor 3B subunit 1

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

PHD finger-like domain-containing protein 5A

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

7b92__assembly_1__model_1

7b92__assembly_1__model_1 | I(q)

7b92__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (7)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 water

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)