1kx1

Rat mannose protein A complexed with Man6-GlcNAc2-Asn

Method: X-RAY DIFFRACTION

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

MANNOSE-BINDING PROTEIN A

Rattus norvegicus

UniProt P19999

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Other combination	Homooligomer	Protein 3 其他Polymer 1	;alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose ; × 1 CALCIUM ION × 9 alpha-D-mannopyranose × 1 water × 3	Consistent with protein count
2	Other combination	Homooligomer	Protein 3 其他Polymer 1	;alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose ; × 1 CALCIUM ION × 9 alpha-D-mannopyranose × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MABA_RAT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–149； UniProt 90–238 Author chain B； PDBConstruct 1–149； UniProt 90–238 Author chain C； PDBConstruct 1–149； UniProt 90–238 Author chain D； PDBConstruct 1–149； UniProt 90–238 Author chain E； PDBConstruct 1–149； UniProt 90–238 Author chain F； PDBConstruct 1–149； UniProt 90–238

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	1kx1
Deposition date deposition_date	2002-01-30
Structure title title	Rat mannose protein A complexed with Man6-GlcNAc2-Asn
Keywords keywords	LECTIN, C-TYPE LECTIN, CALCIUM-BINDING PROTEIN, IMMUNE SYSTEM, SUGAR BINDING PROTEIN; IMMUNE SYSTEM, SUGAR BINDING 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.

1kx1__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1kx1__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1kx1__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	26.97 Å
Rg (electron density)	25.98 Å
Total Rg	26.81 Å
Atom count	3547
Residues	447
Excluded volume	63253 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1kx1__assembly_1__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1kx1__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 (5)

Entity 1 Entity 1 polymer

Description description	MANNOSE-BINDING PROTEIN A
Molecular weight formula_weight	16478.7 kDa
Source method src_method	man
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F
Atom count atom_count	7139

AIEVKLANMEAEINTLKSKLELTNKLHAFSMGKKSGKKFFVTNHERMPFSKVKALCSELRGTVAIPRNAEENKAIQEVAKTSAFLGITDEVTEGQFMYVTGGRLTYSNWKKDEPNDHGSGEDCVTIVDNGLWNDISCQASHTAVCEFPA

Source Source

Source organism organism	Rattus norvegicus
Common name common_name	Norway rat
NCBI taxonomy ID ncbi_taxonomy_id	10116
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 branched

Description description	;alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose ;
Molecular weight formula_weight	990.9 kDa
Source method src_method	man
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	18

Entity 4 Entity 4 non-polymer

Description description	alpha-D-mannopyranose
Molecular weight formula_weight	180.2 kDa
Source method src_method	man
Copy count entity_count	2

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	45

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6. Fold Classification (SCOP + CATH) 18 domains

SCOP 2.08 (12 domains)

Domain ID domain_id	d1kx1a1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.169 — C-type lectin-like
Superfamily Superfamily superfamily	d.169.1 — C-type lectin-like
Family Family family	d.169.1.1 — C-type lectin domain

Domain ID domain_id	d1kx1a2
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.1 — Triple coiled coil domain of C-type lectins
Family Family family	h.1.1.1 — Triple coiled coil domain of C-type lectins

Domain ID domain_id	d1kx1b1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.169 — C-type lectin-like
Superfamily Superfamily superfamily	d.169.1 — C-type lectin-like
Family Family family	d.169.1.1 — C-type lectin domain

Domain ID domain_id	d1kx1b2
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.1 — Triple coiled coil domain of C-type lectins
Family Family family	h.1.1.1 — Triple coiled coil domain of C-type lectins

Domain ID domain_id	d1kx1c1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.169 — C-type lectin-like
Superfamily Superfamily superfamily	d.169.1 — C-type lectin-like
Family Family family	d.169.1.1 — C-type lectin domain

Domain ID domain_id	d1kx1c2
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.1 — Triple coiled coil domain of C-type lectins
Family Family family	h.1.1.1 — Triple coiled coil domain of C-type lectins

Domain ID domain_id	d1kx1d1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.169 — C-type lectin-like
Superfamily Superfamily superfamily	d.169.1 — C-type lectin-like
Family Family family	d.169.1.1 — C-type lectin domain

Domain ID domain_id	d1kx1d2
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.1 — Triple coiled coil domain of C-type lectins
Family Family family	h.1.1.1 — Triple coiled coil domain of C-type lectins

Domain ID domain_id	d1kx1e1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.169 — C-type lectin-like
Superfamily Superfamily superfamily	d.169.1 — C-type lectin-like
Family Family family	d.169.1.1 — C-type lectin domain

Domain ID domain_id	d1kx1e2
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.1 — Triple coiled coil domain of C-type lectins
Family Family family	h.1.1.1 — Triple coiled coil domain of C-type lectins

Domain ID domain_id	d1kx1f1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.169 — C-type lectin-like
Superfamily Superfamily superfamily	d.169.1 — C-type lectin-like
Family Family family	d.169.1.1 — C-type lectin domain

Domain ID domain_id	d1kx1f2
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.1 — Triple coiled coil domain of C-type lectins
Family Family family	h.1.1.1 — Triple coiled coil domain of C-type lectins

CATH v4.4 (6 domains)

Domain ID domain_id	1kx1A00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	100 — Mannose-Binding Protein A; Chain A
Homologous superfamily homologous superfamily	10 — Mannose-Binding Protein A, subunit A

Domain ID domain_id	1kx1B00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	100 — Mannose-Binding Protein A; Chain A
Homologous superfamily homologous superfamily	10 — Mannose-Binding Protein A, subunit A

Domain ID domain_id	1kx1C00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	100 — Mannose-Binding Protein A; Chain A
Homologous superfamily homologous superfamily	10 — Mannose-Binding Protein A, subunit A

Domain ID domain_id	1kx1D00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	100 — Mannose-Binding Protein A; Chain A
Homologous superfamily homologous superfamily	10 — Mannose-Binding Protein A, subunit A

Domain ID domain_id	1kx1E00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	100 — Mannose-Binding Protein A; Chain A
Homologous superfamily homologous superfamily	10 — Mannose-Binding Protein A, subunit A

Domain ID domain_id	1kx1F00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	100 — Mannose-Binding Protein A; Chain A
Homologous superfamily homologous superfamily	10 — Mannose-Binding Protein A, subunit A

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Unit-cell length a length_a	61.800 Å
Unit-cell length b length_b	255.560 Å
Unit-cell length c length_c	61.790 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	119.60 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.800 Å
Low-resolution limit resolution_low	37.040 Å
R factor r_factor	0.2420
R_work r_work	0.2420
R_free r_free	0.2870

Rat mannose protein A complexed with Man6-GlcNAc2-Asn

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

MANNOSE-BINDING PROTEIN A

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

1kx1__assembly_2__model_1

1kx1__assembly_2__model_1 | I(q)

1kx1__assembly_2__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 branched

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 18 domains

SCOP 2.08 (12 domains)

CATH v4.4 (6 domains)

7. Citations (1)

Rat mannose protein A complexed with Man6-GlcNAc2-Asn

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

MANNOSE-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

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1kx1__assembly_2__model_1

1kx1__assembly_2__model_1 | I(q)

1kx1__assembly_2__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 branched

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 18 domains

SCOP 2.08 (12 domains)

CATH v4.4 (6 domains)

7. Citations (1)