SAXSdb — 3h6z

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

Polycomb protein Sfmbt

Drosophila melanogaster

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Other combination	Heteromer	Protein 2 其他Polymer 2	'HR(MLZ)VLR × 1 beta-D-fructofuranose-(2-1)-alpha-D-glucopyranose × 2 water × 2	Consistent with protein count
2	Other combination	Heteromer	Protein 2 其他Polymer 2	'HR(MLZ)VLR × 1 beta-D-fructofuranose-(2-1)-alpha-D-glucopyranose × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SMBT_DROME
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 5–447； UniProt 535–977 Author chain B； PDBConstruct 5–447； UniProt 535–977

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	3h6z
Deposition date deposition_date	2009-04-24
Structure title title	Crystal Structure of the Four MBT Repeats of Drosophila melanogaster Sfmbt in Complex with Peptide RHR (me)K VLR
Keywords keywords	;MBT, MBR repeat, aromatic cage, Chromatin regulator, DNA-binding, Metal-binding, Nucleus, Repressor, Transcription, Transcription regulation, Zinc-finger ;; TRANSCRIPTION
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.

3h6z__assembly_1__model_1

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

Download this curve (.dat)

3h6z__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3h6z__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.97 Å
Rg (electron density)	25.34 Å
Total Rg	25.95 Å
Atom count	3525
Residues	436
Excluded volume	62434 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3h6z__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3h6z__assembly_2__model_1`	dimeric （2）	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 (4)

Entity 1 Entity 1 polymer

Description description	Polycomb protein Sfmbt
Molecular weight formula_weight	50366.7 kDa
Mutation mutation	K185D, R356S, R370D
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	7115

GAMGSYDWLPRLSKENFNAAPVTCFPHAPGCEVWDNLGVGMKVEVENTDCDSIEVIQPGQTPTSFWVATILEIKGYKALMSYEGFDTDSHDFWVNLCNAEVHSVGWCATRGKPLIPPRTIEHKYKDWKDFLVGRLSGARTLPSNFYNKINDSLQSRFRLGLNLECVDKDRISQVRLATVTKIVGDRLFLRYFDSDDGFWCHEDSPIIHPVGWATTVGHNLAAPQDYLERMLAGREAMIEVHEDDATIELFKMNFTFDEYYSDGKTNSFVEGMKLEAVDPLNLSSICPATVMAVLKFGYMMIRIDSYQPDASGSDWFCYHEKSPCIFPAGFCSVNNISVTPPNGYDSRTFTWEGYLSDTGAVAAGQHLFHDIIPDHGFEVGMSLECADLMDPRLVCVATVARVVGRLLKVHFDGWTDEYDQWLDCESADIYPVGWCVLVNHKLEGPPR

Source Source

Source organism organism	Drosophila melanogaster
Common name common_name	Fruit fly
NCBI taxonomy ID ncbi_taxonomy_id	7227
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	'HR(MLZ)VLR
Molecular weight formula_weight	825.0 kDa
Source method src_method	syn
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L,M

HRKVLR

Entity 3 Entity 3 branched

Description description	beta-D-fructofuranose-(2-1)-alpha-D-glucopyranose
Molecular weight formula_weight	342.3 kDa
Source method src_method	man
Copy count entity_count	4

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	65

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6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

Domain ID domain_id	3h6zA01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	3h6zA02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	3h6zA03
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	3h6zA04
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	3h6zB01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	3h6zB02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	3h6zB03
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	3h6zB04
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

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Unit-cell length a length_a	70.800 Å
Unit-cell length b length_b	97.040 Å
Unit-cell length c length_c	214.120 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 2 21 21
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	2.800 Å
Low-resolution limit resolution_low	29.460 Å
R factor r_factor	0.2230
R_work r_work	0.2210
R_free r_free	0.2540

Crystal Structure of the Four MBT Repeats of Drosophila melanogaster Sfmbt in Complex with Peptide RHR (me)K VLR

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

Polycomb protein Sfmbt

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

3h6z__assembly_1__model_1

3h6z__assembly_1__model_1 | I(q)

3h6z__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 branched

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)

Crystal Structure of the Four MBT Repeats of Drosophila melanogaster Sfmbt in Complex with Peptide RHR (me)K VLR

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

Polycomb protein Sfmbt

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

3h6z__assembly_1__model_1

3h6z__assembly_1__model_1 | I(q)

3h6z__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 branched

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)