5fq8

Crystal structure of the SusCD complex BT2261-2264 from Bacteroides thetaiotaomicron

Method: X-RAY DIFFRACTION

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

PUTATIVE LIPOPROTEIN

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 9	OUTER MEMBRANE PROTEIN OMP121 × 2 （Q8A5H5） UNCHARACTERIZED PROTEIN × 2 （Q8A5H8） BT_2262 (UNCHARACTERISED LIPOPROTEIN) × 1 （Q8A5H7） UNCHARACTERISED PROTEIN, BOUND PEPTIDE × 1 UNCHARACTERISED PROTEIN, BOUND PEPTIDE × 1 MAGNESIUM ION × 4 3-decanoyloxypropyl decanoate × 2 CALCIUM ION × 4 (HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE × 4 water × 8	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8A5H6_BACTN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–480； UniProt 19–498 Author chain C； PDBConstruct 1–480； UniProt 19–498

OUTER MEMBRANE PROTEIN OMP121

OrganismNot specified

UniProt Q8A5H5

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 9	PUTATIVE LIPOPROTEIN × 2 （Q8A5H6） UNCHARACTERIZED PROTEIN × 2 （Q8A5H8） BT_2262 (UNCHARACTERISED LIPOPROTEIN) × 1 （Q8A5H7） UNCHARACTERISED PROTEIN, BOUND PEPTIDE × 1 UNCHARACTERISED PROTEIN, BOUND PEPTIDE × 1 MAGNESIUM ION × 4 3-decanoyloxypropyl decanoate × 2 CALCIUM ION × 4 (HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE × 4 water × 8	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8A5H5_BACTN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–984； UniProt 1–984 Author chain D； PDBConstruct 1–984； UniProt 1–984

UNCHARACTERIZED PROTEIN

OrganismNot specified

UniProt Q8A5H8

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 9	PUTATIVE LIPOPROTEIN × 2 （Q8A5H6） OUTER MEMBRANE PROTEIN OMP121 × 2 （Q8A5H5） BT_2262 (UNCHARACTERISED LIPOPROTEIN) × 1 （Q8A5H7） UNCHARACTERISED PROTEIN, BOUND PEPTIDE × 1 UNCHARACTERISED PROTEIN, BOUND PEPTIDE × 1 MAGNESIUM ION × 4 3-decanoyloxypropyl decanoate × 2 CALCIUM ION × 4 (HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE × 4 water × 8	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8A5H8_BACTN
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain E； PDBConstruct 1–148； UniProt 19–166 Author chain F； PDBConstruct 1–148； UniProt 19–166

BT_2262 (UNCHARACTERISED LIPOPROTEIN)

OrganismNot specified

UniProt Q8A5H7

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 9	PUTATIVE LIPOPROTEIN × 2 （Q8A5H6） OUTER MEMBRANE PROTEIN OMP121 × 2 （Q8A5H5） UNCHARACTERIZED PROTEIN × 2 （Q8A5H8） UNCHARACTERISED PROTEIN, BOUND PEPTIDE × 1 UNCHARACTERISED PROTEIN, BOUND PEPTIDE × 1 MAGNESIUM ION × 4 3-decanoyloxypropyl decanoate × 2 CALCIUM ION × 4 (HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE × 4 water × 8	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8A5H7_BACTN
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain G； PDBConstruct 1–212； UniProt 19–230

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	5fq8
Deposition date deposition_date	2015-12-07
Structure title title	Crystal structure of the SusCD complex BT2261-2264 from Bacteroides thetaiotaomicron
Keywords keywords	MEMBRANE PROTEIN, OUTER MEMBRANE NUTRIENT IMPORTER SUSCD COMPLEX; MEMBRANE PROTEIN
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.

5fq8__assembly_1__model_1

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

Download this curve (.dat)

5fq8__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

5fq8__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	48.38 Å
Rg (electron density)	48.50 Å
Total Rg	48.72 Å
Atom count	26287
Residues	3367
Excluded volume	464040 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`5fq8__assembly_1__model_1`	nonameric （9）	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 (11)

Entity 1 Entity 1 polymer

Description description	PUTATIVE LIPOPROTEIN
Molecular weight formula_weight	53145.9 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,C
Atom count atom_count	27220

CDLNINDDPNYPMNDQVTADLIFPSISASIASAVGGEIYNYAGFFAQYYEQKPESNQYNTLCEYTFTESSQQMDYSYRILFAGALEDAKQVLEKTTNPADRFATTILRAYAFQIMVDNTSDSPYSEALQGNANATPKWDTGETVYKGILGEIDAAEAALDGSGMDVPDLIFNKNIAQWKGFANALRLRMYLRFIDANIDAASYTEKVKTLVQNNEFFTGDVKLDCFLDETDKRNPWYNTNAVGLTGNHCAAYPLVSYLSSTGDPRIAYGISKTDADGKYVGQLPGGKTHMQSILGTDNWKNKNVSAIDYSIGATKPVYFFTQAELQFLIAEVYARFHNDDANAKSAYEAGVTADFAVRGFAGQENTILEGACAWSAASTQADKLNLIYMQKWVSLFYMDHMEAWSEIRRTDCPKLSSYSAAQIQASESVYTPGELVAPWTNGLEAGGLMKRMTYPLSARQQNVNTPAGVPGSTPVWWDIK

Entity 2 Entity 2 polymer

Description description	OUTER MEMBRANE PROTEIN OMP121
Molecular weight formula_weight	108954.2 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,D

MQTQEVAIKPNLKVVLRSDAQQIDEVVVTAMGIKRSEKALGYAATSVGGEKIAESRTSDVMSSLAGKIAGVQISSTSSDPGASNSVIIRGVSSLSGTNQPLYVVDGVPLNNSTVYSTDGLNSGYDFGNGANAINPDDVANMTILKGAAATALYGSRAANGVVMITTKSGRKEKGVGIEYNGGVQWSTVLRLPEFQNEFGMGWNGNHTELENGSWGPRFDGSMQLWGNVYNNSQKLKPYVAMPDNIKDFFDAGFRYSNSLSFNGATDKSDYYVSFSQISDDGMIPTDADSYDKYTFSARGSHKAGALTFSSSLNYAYQKNNFATTGQGLSMLNSLYQTPRDISIIGLEDQNDPFNTPGYYYTPYGVMNPYYILNNYLNEYESERFYGKFQLDYEFLKYFKFTYRMGLDTTTGQSDKGKPNLYALYYEGTPNGEGQGSSSPFSGETGQYSEQITRRREINQDIMVNFNMPVNDFNINALVGFNGNERKVSYQYSEVNDLTIPTWFNLKNSGKTPIVEQHMELRRLMGVFGQFEGSWKNMLYLTVTARNDWSSTLPKENRSFFYPGITGSFIFSELLNDNLQDVITFGKIRASWGKTGNDADVYMVNPVYAQSSNRIPFGSLTFPLGGVNAYSAGNVLGSNTLSPEMTTESEVGLNMAFFKNRLSFDVSYYNRNTDKQIFSLAMDPASGYTAQNMNLGKIRNRGIELLISGTPIRTKDFSWELTWNFTKNWSKVISLPEELGGITTIYGLNGGTSMYAITGMPVGVFKAQVAERDPQGRIVVNSSTGLPVEASEFGICGDMNNKYQMGVSTNLKYKGISLGIDFDIRQGGVMYSRTKDINYFTGNAIQTAYNDRNPLIVPNSVNKIVNGENVTYVENTTPITSSNIYKYWGDGGSDMGSCFLVDKSYVKLRSVVLGWDLPKRWLAKTPFQAVKVSAYGNNLFVWTPSSNTFIDPEMTSFGNDLEGNYGEYTANPSSRRFGFNLMVKF

Entity 3 Entity 3 polymer

Description description	UNCHARACTERIZED PROTEIN
Molecular weight formula_weight	16429.0 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E,F

CDNDTEPGGTAVEKMAGDWWVTVNAFIDGKEVEDPFGAGHLQMSTYNTASNSETEMWLDDLGNFWEYKLKVNVNYAARTFSTTGFVDNVTYESKVKITDGKVLEKAATTPSGMPADSIVYMVQFDDDEDGLTYKVSGFRRTGFPADDF

Entity 4 Entity 4 polymer

Description description	BT_2262 (UNCHARACTERISED LIPOPROTEIN)
Molecular weight formula_weight	23399.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	G

CDKSTDDTSKVTYFVTLEREGDEKIVLEKGQPFVEPGYYAEMNGEDITESVQIKGSVDVNTPGIYNLVYAAYNEDGFAKTFTRTVYVADNTASPLKSGIYTVAEGSKRTAPSVVAFSGYEIVIFQMEPGIFYISDFLGGWYDQRAGYGPDYAMVGKFELNDDNTITPLESYVAGWGDSMDQMTNTLLDPATGTLKWTVAYAGQLSFDIIVKQ

Entity 5 Entity 5 polymer

Description description	UNCHARACTERISED PROTEIN, BOUND PEPTIDE
Molecular weight formula_weight	588.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	P

GGGGGGGGGG

Entity 6 Entity 6 polymer

Description description	UNCHARACTERISED PROTEIN, BOUND PEPTIDE
Molecular weight formula_weight	531.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	Q

GGGGGGGGG

Entity 7 Entity 7 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 8 Entity 8 non-polymer

Description description	3-decanoyloxypropyl decanoate
Molecular weight formula_weight	384.6 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 9 Entity 9 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 10 Entity 10 non-polymer

Description description	(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE
Molecular weight formula_weight	306.4 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 11 Entity 11 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	928

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	5fq8A00
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	390 —

Domain ID domain_id	5fq8C00
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	390 —

Domain ID domain_id	5fq8E00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	128 — Lipocalin
Homologous superfamily homologous superfamily	220 —

Domain ID domain_id	5fq8F00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	128 — Lipocalin
Homologous superfamily homologous superfamily	220 —

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Unit-cell length a length_a	92.110 Å
Unit-cell length b length_b	122.743 Å
Unit-cell length c length_c	122.830 Å
Unit-cell angle α angle_alpha	111.41 °
Unit-cell angle β angle_beta	98.33 °
Unit-cell angle γ angle_gamma	98.51 °
Molecules per unit cell Z z_pdb	2

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	2.750 Å
Low-resolution limit resolution_low	52.933 Å
R factor r_factor	0.2079
R_work r_work	0.2052
R_free r_free	0.2592

Crystal structure of the SusCD complex BT2261-2264 from Bacteroides thetaiotaomicron

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

PUTATIVE LIPOPROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

OUTER MEMBRANE PROTEIN OMP121

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

UNCHARACTERIZED PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

BT_2262 (UNCHARACTERISED LIPOPROTEIN)

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

5fq8__assembly_1__model_1

5fq8__assembly_1__model_1 | I(q)

5fq8__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 (11)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 polymer

Polymer Polymer

Entity 6 Entity 6 polymer

Polymer Polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 non-polymer

Entity 11 Entity 11 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)