SAXSdb — 3srj

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

Apical membrane antigen 1, AMA1

Plasmodium falciparum

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	R1 peptide × 2 water × 3	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 3	R1 peptide × 2 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q7KQK5_PLAF7
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–348； UniProt 97–442 Author chain B； PDBConstruct 3–348； UniProt 97–442

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	3srj
Deposition date deposition_date	2011-07-07
Structure title title	PfAMA1 in complex with invasion-inhibitory peptide R1
Keywords keywords	AMA1, Plasmodium falciparum, inhibitory peptide, malaria, CELL INVASION, CELL INVASION-inhibitor complex; CELL INVASION/inhibitor
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.

3srj__assembly_1__model_1

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

Download this curve (.dat)

3srj__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3srj__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.40 Å
Rg (electron density)	20.47 Å
Total Rg	21.38 Å
Atom count	2582
Residues	323
Excluded volume	45732 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3srj__assembly_1__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3srj__assembly_2__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 (3)

Entity 1 Entity 1 polymer

Description description	Apical membrane antigen 1, AMA1
Molecular weight formula_weight	43665.9 kDa
Mutation mutation	N162K, T288V, S373D, N422D, S423K
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	5639

EFIEIVERSNYMGNPWTEYMAKYDIEEVHGSGIRVDLGEDAEVAGTQYRLPSGKCPVFGKGIIIENSKTTFLTPVATGNQYLKDGGFAFPPTEPLMSPMTLDEMRHFYKDNKYVKNLDELTLCSRHAGNMIPDNDKNSNYKYPAVYDDKDKKCHILYIAAQENNGPRYCNKDESKRNSMFCFRPAKDISFQNYVYLSKNVVDNWEKVCPRKNLQNAKFGLWVDGNCEDIPHVNEFPAIDLFECNKLVFELSASDQPKQYEQHLTDYEKIKEGFKNKNADMIKSAFLPTGAFKADRYKSHGKGYNWGNYNTETQKCEIFNVKPTCLINDKSYIATTALSHPIEVENNFPSVPRAAAAASFLEQKLISEEDLNSAVDHHHHHH

Source Source

Source organism organism	Plasmodium falciparum
NCBI taxonomy ID ncbi_taxonomy_id	36329
Host organism host_organism	Pichia pastoris

Entity 2 Entity 2 polymer

Description description	R1 peptide
Molecular weight formula_weight	2371.9 kDa
Source method src_method	syn
Copy count entity_count	4

Polymer Polymer

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

VFAEFLPLFSKFGSRMHILK

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	450

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	3srjA01
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	4 — Hepatocyte Growth Factor
Homologous superfamily homologous superfamily	10 — Hepatocyte Growth Factor

Domain ID domain_id	3srjB01
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	4 — Hepatocyte Growth Factor
Homologous superfamily homologous superfamily	10 — Hepatocyte Growth Factor

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Unit-cell length a length_a	38.320 Å
Unit-cell length b length_b	144.320 Å
Unit-cell length c length_c	145.640 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	16

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.150 Å
Low-resolution limit resolution_low	37.060 Å
R factor r_factor	0.1726
R_work r_work	0.1713
R_free r_free	0.2138

PfAMA1 in complex with invasion-inhibitory peptide R1

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

Apical membrane antigen 1, AMA1

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

3srj__assembly_1__model_1

3srj__assembly_1__model_1 | I(q)

3srj__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)

PfAMA1 in complex with invasion-inhibitory peptide R1

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

Apical membrane antigen 1, AMA1

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

3srj__assembly_1__model_1

3srj__assembly_1__model_1 | I(q)

3srj__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)