1qfq

Bacteriophage Lambda N-protein-NutboxB-RNA Complex

Method: SOLUTION NMR

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

36-mer N-terminal peptide of the N protein

Enterobacteria phage lambda

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Monomer	Protein 1 RNA 1	15-mer nutRboxB RNA hairpin × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	REGN_LAMBD
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–35； UniProt 2–36

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	1qfq
Deposition date deposition_date	1999-04-12
Structure title title	Bacteriophage Lambda N-protein-NutboxB-RNA Complex
Keywords keywords	;BACTERIOPHAGE LAMBDA; ANTITERMINATION; PEPTIDE-RNA-COMPLEX; N-NUT; GNRA TETRALOOP; BENT-ALPHA-HELIX; PEPTIDE-RNA-RECOGNITION, TRANSCRIPTION-RNA COMPLEX ;; TRANSCRIPTION/RNA
Experimental Method method	SOLUTION NMR

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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.

1qfq__assembly_1__model_1

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

Download this curve (.dat)

1qfq__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1qfq__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	14.11 Å
Rg (electron density)	14.40 Å
Total Rg	15.17 Å
Atom count	1067
Residues	50
Excluded volume	9493 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1qfq__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	2	`1qfq__assembly_1__model_2`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	3	`1qfq__assembly_1__model_3`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	4	`1qfq__assembly_1__model_4`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	5	`1qfq__assembly_1__model_5`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	6	`1qfq__assembly_1__model_6`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	7	`1qfq__assembly_1__model_7`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	8	`1qfq__assembly_1__model_8`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	9	`1qfq__assembly_1__model_9`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	10	`1qfq__assembly_1__model_10`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	11	`1qfq__assembly_1__model_11`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	12	`1qfq__assembly_1__model_12`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	13	`1qfq__assembly_1__model_13`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	14	`1qfq__assembly_1__model_14`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	15	`1qfq__assembly_1__model_15`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	16	`1qfq__assembly_1__model_16`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	17	`1qfq__assembly_1__model_17`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	18	`1qfq__assembly_1__model_18`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	19	`1qfq__assembly_1__model_19`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	20	`1qfq__assembly_1__model_20`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	21	`1qfq__assembly_1__model_21`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	22	`1qfq__assembly_1__model_22`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	23	`1qfq__assembly_1__model_23`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	24	`1qfq__assembly_1__model_24`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	25	`1qfq__assembly_1__model_25`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	26	`1qfq__assembly_1__model_26`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	27	`1qfq__assembly_1__model_27`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	28	`1qfq__assembly_1__model_28`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	29	`1qfq__assembly_1__model_29`	dimeric （2）	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 (2)

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6. Fold Classification (SCOP + CATH) 1 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d1qfqb_
Class class	j — Peptides
Fold Fold fold	j.9 — Arg-rich RNA binding peptides
Superfamily Superfamily superfamily	j.9.5 — Box B RNA-binding N peptide
Family Family family	j.9.5.1 — Box B RNA-binding N peptide

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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	1

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

Description description	15-mer nutRboxB RNA hairpin
Molecular weight formula_weight	4854.0 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer type type	polyribonucleotide
Chain IDs strand_id	A
Atom count atom_count	30943

Description description	36-mer N-terminal peptide of the N protein
Molecular weight formula_weight	4007.6 kDa
Source method src_method	man
Copy count entity_count	1

Bacteriophage Lambda N-protein-NutboxB-RNA Complex

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

36-mer N-terminal peptide of the N protein

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

1qfq__assembly_1__model_1

1qfq__assembly_1__model_1 | I(q)

1qfq__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 1 domains

SCOP 2.08 (1 domains)

7. Citations (1)

Source organism organism	Enterobacteria phage lambda
NCBI taxonomy ID ncbi_taxonomy_id	10710
Host organism host_organism	Escherichia coli

Bacteriophage Lambda N-protein-NutboxB-RNA Complex

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

36-mer N-terminal peptide of the N 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

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1qfq__assembly_1__model_1

1qfq__assembly_1__model_1 | I(q)

1qfq__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 1 domains

SCOP 2.08 (1 domains)

7. Citations (1)