SAXSdb — 2pik

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

No usable UniProt protein identity is available for this entry.

The relationship tables retain this entry's assembly and composition data, but cross-PDB links for the same protein cannot be established reliably without a unified protein identity.

Assembly Composition of the Current Entry

Assembly	Physical composition	Protein state	蛋白 / DNA / RNA / 其他Polymer	Data consistency
1	Other combination	No protein	0 / 1 / 0 / 1	Review required

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	2pik
Deposition date deposition_date	1996-12-31
Structure title title	CALICHEAMICIN GAMMA1I-DNA COMPLEX, NMR, 6 STRUCTURES
Keywords keywords	;DEOXYRIBONUCLEIC ACID, CALICHEAMICIN GAMMA1I - DNA COMPLEX, ENEDIYNE ALIGNMENT IN MINOR GROOVE, SACCHARIDE DNA MINOR GROOVE INTERACTIONS, INTERMOLECULAR DRUG IODINE-GUANINE AMINO PROTON INTERACTIONS, SPECIFICITY AND CLEAVAGE PROCESS, DNA ;; DNA
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.

2pik__assembly_1__model_4

Assembly 1 · Model 4 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2pik__assembly_1__model_4 | I(q)

100 plotted points; both axes use logarithmic scales.

2pik__assembly_1__model_4 | P(r) · Pending

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

Rg（Guinier）	11.87 Å
Rg (electron density)	11.04 Å
Total Rg	12.11 Å
Atom count	727
Residues	18
Excluded volume	6923 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2pik__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	2	`2pik__assembly_1__model_2`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	3	`2pik__assembly_1__model_3`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	4	`2pik__assembly_1__model_4`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	5	`2pik__assembly_1__model_5`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	6	`2pik__assembly_1__model_6`	monomeric （1）	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 (6)

Entity 1 Entity 1 polymer

Description description	;DNA(5'-D(CAPCPTPCPCPTPGPGPTPTPTPTP* TPGPTPGPAPGPGPAPCP*CP)-3') ;
Molecular weight formula_weight	7038.5 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	A
Atom count atom_count	4362

CACTCCTGGTTTTTCCAGGAGTG

Entity 2 Entity 2 branched

Description description	2,4-dideoxy-4-(ethylamino)-3-O-methyl-alpha-L-threo-pentopyranose-(1-2)-4-amino-4,6-dideoxy-beta-D-glucopyranose
Molecular weight formula_weight	320.4 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	2,6-dideoxy-4-thio-beta-D-allopyranose
Molecular weight formula_weight	164.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	4-HYDROXY-5-IODO-2,3-DIMETHOXY-6-METHYLBENZOIC ACID
Molecular weight formula_weight	338.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 non-polymer

Description description	3-O-methyl-alpha-L-rhamnopyranose
Molecular weight formula_weight	178.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 6 Entity 6 non-polymer

Description description	[1,8-DIHYDROXY-11-OXO-13-(2-METHYLTRITHIO-ETHYLIDENE)-BICYCLO[7.3.1]TRIDECA-4,9-DIENE-2,6-DIYN-10-YL]-CARBAMIC ACID METHYL ESTER
Molecular weight formula_weight	407.5 kDa
Source method src_method	syn
Copy count entity_count	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	1

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

CALICHEAMICIN GAMMA1I-DNA COMPLEX, NMR, 6 STRUCTURES