SAXSdb — 7o7o

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

Alpha-2-macroglobulin

OrganismNot specified

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Other combination Homooligomer Protein × 4 其他Polymer 12 PDB declaration: tetrameric（4） Consistent with protein copy count	Chain A； UniProt 1–1474 Chain B； UniProt 1–1474 Chain C； UniProt 1–1474 Chain D； UniProt 1–1474	Not recorded	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ;alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ; × 4 beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 18	ELECTRON MICROSCOPY cryo-EM buffer：pH 7.5 cryo-EM vitrification conditions：Cryogen ETHANE	Resolution 4.80 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 7O7O	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1AYO RECEPTOR BINDING DOMAIN OF BOVINE ALPHA-2-MACROGLOBULIN Deposited 1997-11-07	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1338–1468（131 aa） Fragment：RECEPTOR-BINDING DOMAIN Chain B 1338–1468（131 aa） Fragment：RECEPTOR-BINDING DOMAIN	Not recorded	CA CALCIUM ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.9；38% PEGMMES 2000, 25 MM CACL2, 100 MM HEPES, PH 6.9	Resolution 1.90 Å R-free 0.239
1BV8 RECEPTOR DOMAIN FROM ALPHA-2-MACROGLOBULIN Deposited 1998-09-22	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1337–1474（138 aa） Fragment：RECEPTOR BINDING DOMAIN	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 5.1；298 K；Ionic strength (raw mmCIF value) 0.4；Pressure 1	Resolution not provided
2P9R Human alpha2-macroglogulin is composed of multiple domains, as predicted by homology with complement component C3 Deposited 2007-03-26	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 126–227（102 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.6；295 K；11% PEG 3350, 200mM di-ammonium hydrogen citrate, pH 6.6, VAPOR DIFFUSION, HANGING DROP, temperature 295K	Resolution 2.30 Å R-free 0.281
2P9R Human alpha2-macroglogulin is composed of multiple domains, as predicted by homology with complement component C3 Deposited 2007-03-26	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 126–227（102 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.6；295 K；11% PEG 3350, 200mM di-ammonium hydrogen citrate, pH 6.6, VAPOR DIFFUSION, HANGING DROP, temperature 295K	Resolution 2.30 Å R-free 0.281
6TAV Crystal structure of endopeptidase-induced alpha2-macroglobulin Deposited 2019-10-30	Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–1474（1474 aa） Chain B 1–1474（1474 aa） Chain C 1–1474（1474 aa） Chain D 1–1474（1474 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 11	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；Equivolumetric drops consisting of 0.2M tribasic ammonium citrate, pH6.4, 15% (w/v) polyethylene glycol 3350, plus 0.05M sodium fluoride as an additive, and protein solution at 4.9 absorption units at lambda=280nm yielded a single large well-shaped monocrystal after several months. This crystal could not be reproduced despite extensive trials.	Resolution 4.20 Å R-free 0.282
7O7L (h-alpha2M)4 native I Deposited 2021-04-13	Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–1474（1474 aa） Chain B 1–1474（1474 aa） Chain C 1–1474（1474 aa） Chain D 1–1474（1474 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 26	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.50 Å
7O7M (h-alpha2M)4 native II Deposited 2021-04-13	Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–1474（1474 aa） Chain B 1–1474（1474 aa） Chain C 1–1474（1474 aa） Chain D 1–1474（1474 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 26	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 6.60 Å
7O7N (h-alpha2M)4 semiactivated I state Deposited 2021-04-13	Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–1474（1474 aa） Chain B 1–1474（1474 aa） Chain C 1–1474（1474 aa） Chain D 1–1474（1474 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 26	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 7.30 Å
7O7P (h-alpha2M)4 activated state Deposited 2021-04-13	Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–1474（1474 aa） Chain B 1–1474（1474 aa） Chain C 1–1474（1474 aa） Chain D 1–1474（1474 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 20	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.60 Å
7O7Q (h-alpha2M)4 trypsin-activated state Deposited 2021-04-13	Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–1474（1474 aa） Chain B 1–1474（1474 aa） Chain C 1–1474（1474 aa） Chain D 1–1474（1474 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 20	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.60 Å
7O7R (h-alpha2M)4 plasmin-activated I state Deposited 2021-04-13	Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–1474（1474 aa） Chain B 1–1474（1474 aa） Chain C 1–1474（1474 aa） Chain D 1–1474（1474 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 20	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.90 Å
7O7S (h-alpha2M)4 plasmin-activated II state Deposited 2021-04-13	Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–1474（1474 aa） Chain B 1–1474（1474 aa） Chain C 1–1474（1474 aa） Chain D 1–1474（1474 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 20	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.30 Å
7VON Native alpha-2-macroglobulin monomer Deposited 2021-10-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 27–1468（1442 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.2 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 5.20 Å
7VOO Induced alpha-2-macroglobulin monomer Deposited 2021-10-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric	Chain A 27–1335（1309 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF)	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3	ELECTRON MICROSCOPY cryo-EM buffer pH 7.2 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.90 Å

13 other PDB entries and 14 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	A2MG_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–1474； UniProt 1–1474 Author chain B； PDBConstruct 1–1474； UniProt 1–1474 Author chain C； PDBConstruct 1–1474； UniProt 1–1474 Author chain D； PDBConstruct 1–1474； UniProt 1–1474

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	7o7o
Deposition date deposition_date	2021-04-13
Structure title title	(h-alpha2M)4 semiactivated II state
Keywords keywords	alpha2-macroglobulin, proteinase, serum proteostasis, hydrolase inhibitor, PROTEIN BINDING; PROTEIN BINDING
Experimental Method method	ELECTRON MICROSCOPY

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	70.00 Å
Radius of gyration Rg (electron density) rg_electron	69.74 Å
Forward intensity I(0) i0	5010120000.00
Molecular weight molecular_weight	605820.0 kDa
Excluded volume excluded_volume	760850 Å³
Envelope volume envelope_volume	1394000 Å³
Hydration-shell volume shell_volume	168950 Å³
Envelope diameter envelope_diameter	222.3 Å
Shell Rg shell_rg	74.26 Å
Envelope Rg envelope_rg	63.77 Å
Shape Rg shape_rg	69.73 Å
Total Rg total_rg	69.87 Å
Total atoms total_atoms	42642
Residues n_residues	5376
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	256.8 Å
Rg (real space) rg_real	73.51 Å
Rg uncertainty (real space) rg_real_error	1.59 Å
I(0) (real space) i0_real	5.0330e+09
I(0) uncertainty (real space) i0_real_error	9.9810e+07
Rg (reciprocal space) rg_reciprocal	70.92 Å
I(0) (reciprocal space) i0_reciprocal	5021000000.0000
Solution quality estimate total_estimate	0.8753
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	2
Primary peak position r_peak_primary	105.1 Å
Skewness Skewness skewness	0.477
Kurtosis Kurtosis kurtosis	0.579
Angular range angular_range	— – 0.1100 Å⁻¹
Current regularization parameter α current_alpha	0.9048
Highest regularization parameter α highest_alpha	415700000.0000
Real-space data points n_real_points	23
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.621; Stabil: 0.880; Sysdev: 1.000; Positv: 1.000; Valcen: 0.948; Smooth: 0.944

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Description description	Alpha-2-macroglobulin
Molecular weight formula_weight	163465.1 kDa
Source method src_method	nat
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	42642

MGKNKLLHPSLVLLLLVLLPTDASVSGKPQYMVLVPSLLHTETTEKGCVLLSYLNETVTVSASLESVRGNRSLFTDLEAENDVLHCVAFAVPKSSSNEEVMFLTVQVKGPTQEFKKRTTVMVKNEDSLVFVQTDKSIYKPGQTVKFRVVSMDENFHPLNELIPLVYIQDPKGNRIAQWQSFQLEGGLKQFSFPLSSEPFQGSYKVVVQKKSGGRTEHPFTVEEFVLPKFEVQVTVPKIITILEEEMNVSVCGLYTYGKPVPGHVTVSICRKYSDASDCHGEDSQAFCEKFSGQLNSHGCFYQQVKTKVFQLKRKEYEMKLHTEAQIQEEGTVVELTGRQSSEITRTITKLSFVKVDSHFRQGIPFFGQVRLVDGKGVPIPNKVIFIRGNEANYYSNATTDEHGLVQFSINTTNVMGTSLTVRVNYKDRSPCYGYQWVSEEHEEAHHTAYLVFSPSKSFVHLEPMSHELPCGHTQTVQAHYILNGGTLLGLKKLSFYYLIMAKGGIVRTGTHGLLVKQEDMKGHFSISIPVKSDIAPVARLLIYAVLPTGDVIGDSAKYDVENCLANKVDLSFSPSQSLPASHAHLRVTAAPQSVCALRAVDQSVLLMKPDAELSASSVYNLLPEKDLTGFPGPLNDQDNEDCINRHNVYINGITYTPVSSTNEKDMYSFLEDMGLKAFTNSKIRKPKMCPQLQQYEMHGPEGLRVGFYESDVMGRGHARLVHVEEPHTETVRKYFPETWIWDLVVVNSAGVAEVGVTVPDTITEWKAGAFCLSEDAGLGISSTASLRAFQPFFVELTMPYSVIRGEAFTLKATVLNYLPKCIRVSVQLEASPAFLAVPVEKEQAPHCICANGRQTVSWAVTPKSLGNVNFTVSAEALESQELCGTEVPSVPEHGRKDTVIKPLLVEPEGLEKETTFNSLLCPSGGEVSEELSLKLPPNVVEESARASVSVLGDILGSAMQNTQNLLQMPYGCGEQNMVLFAPNIYVLDYLNETQQLTPEIKSKAIGYLNTGYQRQLNYKHYDGSYSTFGERYGRNQGNTWLTAFVLKTFAQARAYIFIDEAHITQALIWLSQRQKDNGCFRSSGSLLNNAIKGGVEDEVTLSAYITIALLEIPLTVTHPVVRNALFCLESAWKTAQEGDHGSHVYTKALLAYAFALAGNQDKRKEVLKSLNEEAVKKDNSVHWERPQKPKAPVGHFYEPQAPSAEVEMTSYVLLAYLTAQPAPTSEDLTSATNIVKWITKQQNAQGGFSSTQDTVVALHALSKYGAATFTRTGKAAQVTIQSSGTFSSKFQVDNNNRLLLQQVSLPELPGEYSMKVTGEGCVYLQTSLKYNILPEKEEFPFALGVQTLPQTCDEPKAHTSFQISLSVSYTGSRSASNMAIVDVKMVSGFIPLKPTVKMLERSNHVSRTEVSSNHVLIYLDKVSNQTLSLFFTVLQDVPVRDLKPAIVKVYDYYETDEFAIAEYNAPCSKDLGNA

Entity 2 Entity 2 branched

Description description	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	424.4 kDa
Source method src_method	man
Copy count entity_count	6

Entity 3 Entity 3 branched

Description description	;alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ;
Molecular weight formula_weight	748.7 kDa
Source method src_method	man
Copy count entity_count	4

Entity 4 Entity 4 branched

Description description	beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	586.5 kDa
Source method src_method	man
Copy count entity_count	2

Entity 5 Entity 5 non-polymer

Description description	2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	221.2 kDa
Source method src_method	syn
Copy count entity_count	18

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8. Citations (1)

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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	4.80 Å
Resolution测定方法 resolution_method	—
颗粒数 num_particles	185640

fit	/app/data/saxs_computation/o7/7o7o/7o7o.fit
pddf	/app/data/pr_computation/o7/7o7o/7o7o.pr.out
profile	/app/data/saxs_computation/o7/7o7o/7o7o.dat

(h-alpha2M)4 semiactivated II state

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

Alpha-2-macroglobulin

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

冷冻电镜 EM 3D