SAXSdb — 9cmg

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

Transferrin-binding protein A

Neisseria meningitidis

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	Transferrin × 1 （P02787） Transferrin-binding protein B × 1 （Q9JPI9） BICARBONATE ION × 2 FE (III) ION × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9JPJ0_NEIME
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 25–915； UniProt 25–915

Transferrin

OrganismNot specified

UniProt P02787

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	Transferrin-binding protein A × 1 （Q9JPJ0） Transferrin-binding protein B × 1 （Q9JPI9） BICARBONATE ION × 2 FE (III) ION × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TRFE_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain F； PDBConstruct 1–698； UniProt 1–698

Transferrin-binding protein B

Neisseria meningitidis

UniProt Q9JPI9

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	Transferrin-binding protein A × 1 （Q9JPJ0） Transferrin × 1 （P02787） BICARBONATE ION × 2 FE (III) ION × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9JPI9_NEIME
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain B； PDBConstruct 4–696； UniProt 20–712

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	9cmg
Deposition date deposition_date	2024-07-15
Structure title title	Transferrin Binding Protein A in complex with transferrin binding protein B and transferrin (iron bound in both lobes of Tf)
Keywords keywords	TonB dependent Transporter, Iron Bound triple complex of Tbp-Tf system, Iron transporter, Tbp proteins, MEMBRANE PROTEIN; MEMBRANE PROTEIN
Experimental Method method	ELECTRON MICROSCOPY

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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.

9cmg__assembly_1__model_1

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

Download this curve (.dat)

9cmg__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9cmg__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	47.95 Å
Rg (electron density)	48.10 Å
Total Rg	48.10 Å
Atom count	16438
Residues	2112
Excluded volume	288310 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9cmg__assembly_1__model_1`	trimeric （3）	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 (5)

Entity 1 Entity 1 polymer

Description description	Transferrin-binding protein A
Molecular weight formula_weight	102569.0 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	16460

MSNHHHHHHHHHHENLYFQGAMDIENVQAGQAQEKQLDTIQVKAKKQKTRRDNEVTGLGKLVKSSDTLSKEQVLNIRDLTRYDPGIAVVEQGRGASSGYSIRGMDKNRVSLTVDGVSQIQSYTAQAALGGTRTAGSSGAINEIEYENVKAVEISKGSNSVEQGSGALAGSVAFQTKTADDVIGEGRQWGIQSKTAYSGKNRGLTQSIALAGRIGGAEALLIHTGRRAGEIRAHEDAGRGVQSFNRLVPVEDSSNYAYFIVKEECKNGSYETCKANPKKDVVGKDERQTVSTRDYTGPNRFLADPLSYESRSWLFRPGFRFENKRHYIGGILEHTQQTFDTRDMTVPAFLTKAVFDANKKQAGSLPGNGKYAGNHKYGGLFTNGENGALVGAEYGTGVFYDETHTKSRYGLEYVYTNADKDTWADYARLSYDRQGVGLDNHFQQTHCSADGSDKYCRPSADKPFSYYKSDRVIYGESHRLLQAAFKKSFDTAKIRHNLSMNLGFDRFGSNMRHQDYYYQHANRAYSSNTPPQNNGKKISPNGSETSPYWVTIGRGNVVTGQICRLGNNTYTDCTPRSINGKSYYAAVRDNMRLGRWADVGAGLRYDYRSTHSDDGSVSTGTHRTLSWNAGIVLKPTDWLDLTYRTSTGFRLPSFAEMYGWRAGVQSKAVKIDPEKSFNKEAGIVFKGDFGNLEASWFNNAYRDLIVRGYEAQIKDGKEEAKGDPAYLNAQSARITGINILGKIDWNGVWDKLPEGWYSTFAYNRMRVRDIKKRADRTDIQSHLFDAIQPSRYVVGLGYDQPEGKWGVNGMLTYSKAKEITELLGSRALLNGNSRNTKATARRTRPWYIVDVSGYYTVKKHFTLRAGVYNLMNYRYVTWENVRQTAGGAVNQHKNVGVYNRYAAPGRNYTFSLEMKF

Source Source

Source organism organism	Neisseria meningitidis
NCBI taxonomy ID ncbi_taxonomy_id	487
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Transferrin
Molecular weight formula_weight	77153.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	F

MRLAVGALLVCAVLGLCLAVPDKTVRWCAVSEHEATKCQSFRDHMKSVIPSDGPSVACVKKASYLDCIRAIAANEADAVTLDAGLVYDAYLAPNNLKPVVAEFYGSKEDPQTFYYAVAVVKKDSGFQMNQLRGKKSCHTGLGRSAGWNIPIGLLYCDLPEPRKPLEKAVANFFSGSCAPCADGTDFPQLCQLCPGCGCSTLNQYFGYSGAFKCLKDGAGDVAFVKHSTIFENLANKADRDQYELLCLDNTRKPVDEYKDCHLAQVPSHTVVARSMGGKEDLIWELLNQAQEHFGKDKSKEFQLFSSPHGKDLLFKDSAHGFLKVPPRMDAKMYLGYEYVTAIRNLREGTCPEAPTDECKPVKWCALSHHERLKCDEWSVNSVGKIECVSAETTEDCIAKIMNGEADAMSLDGGFVYIAGKCGLVPVLAENYNKSDNCEDTPEAGYFAVAVVKKSASDLTWDNLKGKKSCHTAVGRTAGWNIPMGLLYNKINHCRFDEFFSEGCAPGSKKDSSLCKLCMGSGLNLCEPNNKEGYYGYTGAFRCLVEKGDVAFVKHQTVPQNTGGKNPDPWAKNLNEKDYELLCLDGTRKPVEEYANCHLARAPNHAVVTRKDKEACVHKILRQQQHLFGSNVTDCSGNFCLFRSETKDLLFRDDTVCLAKLHDRNTYEKYLGEEYVKAVGNLRKCSTSSLLEACTFRRP

Entity 3 Entity 3 polymer

Description description	Transferrin-binding protein B
Molecular weight formula_weight	75684.1 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

GAMACLGGGGSFDLDSVDTEAPRPAPKYQDVFSEKPQAQKDQGGYGFAMRLKRRNWYPQAKEDEVKLDESDWEATGLPDEPKELPKRQKSVIEKVETDSDNNIYSSPYLKPSNHQNGNTGNGINQPKNQAKDYENFKYVYSGWFYKHAKREFNLKVEPKSAKNGDDGYIFYHGKEPSRQLPASGKITYKGVWHFATDTKKGQKFREIIQPSKSQGDRYSGFSGDDGEEYSNKNKSTLTDGQEGYGFTSNLEVDFHNKKLTGKLIRNNANTDNNQATTTQYYSLEAQVTGNRFNGKATATDKPQQNSETKEHPFVSDSSSLSGGFFGPQGEELGFRFLSDDQKVAVVGSAKTKDKPANGNTAAASGGTDAAASNGAAGTSSENGKLTTVLDAVELKLGDKKVQKLDNFSNAAQLVVDGIMIPLLPEASESGNNQANQGTNGGTAFTRKFDHTPESDKKDAQAGTQTNGAQTASNTAGDTNGKTKTYEVEVCCSNLNYLKYGMLTRKNSKSAMQAGESSSQADAKTEQVEQSMFLQGERTDEKEIPSEQNIVYRGSWYGYIANDKSTSWSGNASNATSGNRAEFTVNFADKKITGTLTADNRQEATFTIDGNIKDNGFEGTAKTAESGFDLDQSNTTRTPKAYITDAKVQGGFYGPKAEELGGWFAYPGDKQTKNATNASGNSSATVVFGAKRQQPVQ

Source Source

Source organism organism	Neisseria meningitidis
NCBI taxonomy ID ncbi_taxonomy_id	487
Host organism host_organism	Escherichia coli

Entity 4 Entity 4 non-polymer

Description description	BICARBONATE ION
Molecular weight formula_weight	61.0 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 non-polymer

Description description	FE (III) ION
Molecular weight formula_weight	55.8 kDa
Source method src_method	syn
Copy count entity_count	2

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 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	—

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

Resolution resolution	3.71 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	84242

Transferrin Binding Protein A in complex with transferrin binding protein B and transferrin (iron bound in both lobes of Tf)

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

Transferrin-binding protein A

State in the Current Structure

Other States of the Same Protein in the Database

Transferrin

State in the Current Structure

Other States of the Same Protein in the Database

Transferrin-binding protein B

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

9cmg__assembly_1__model_1

9cmg__assembly_1__model_1 | I(q)

9cmg__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

7. Citations (1)

Transferrin Binding Protein A in complex with transferrin binding protein B and transferrin (iron bound in both lobes of Tf)

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

Transferrin-binding protein A

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Transferrin

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Transferrin-binding protein B

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

9cmg__assembly_1__model_1

9cmg__assembly_1__model_1 | I(q)

9cmg__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

7. Citations (1)