6pch

E. coli 50S ribosome bound to compound 21

Method: ELECTRON MICROSCOPY

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

50S ribosomal protein L2

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 5 RNA 2	23S ribosomal RNA × 1 5S ribosomal RNA × 1 50S ribosomal protein L15 × 1 （A0A037Y8L6） 50S ribosomal protein L4 × 1 （D7Z9F6） 50S ribosomal protein L3 × 1 （P60438） 50S ribosomal protein L13 × 1 （D7ZET0） ;(3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-12-methyl-3-(propan-2-yl)-4-(prop-2-en-1-yl)-8,9,14,15,24,25,26,26a-octahydro-1H,3H,22H-21,18-(azeno)pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H)-tetrone ; × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RL2_ECOLI
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain K； PDBConstruct 1–271； UniProt 2–272

50S ribosomal protein L15

OrganismNot specified

UniProt A0A037Y8L6

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 5 RNA 2	23S ribosomal RNA × 1 5S ribosomal RNA × 1 50S ribosomal protein L2 × 1 （P60422） 50S ribosomal protein L4 × 1 （D7Z9F6） 50S ribosomal protein L3 × 1 （P60438） 50S ribosomal protein L13 × 1 （D7ZET0） ;(3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-12-methyl-3-(propan-2-yl)-4-(prop-2-en-1-yl)-8,9,14,15,24,25,26,26a-octahydro-1H,3H,22H-21,18-(azeno)pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H)-tetrone ; × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A037Y8L6_ECOLX
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain L； PDBConstruct 1–144； UniProt 1–144

50S ribosomal protein L4

OrganismNot specified

UniProt D7Z9F6

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 5 RNA 2	23S ribosomal RNA × 1 5S ribosomal RNA × 1 50S ribosomal protein L2 × 1 （P60422） 50S ribosomal protein L15 × 1 （A0A037Y8L6） 50S ribosomal protein L3 × 1 （P60438） 50S ribosomal protein L13 × 1 （D7ZET0） ;(3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-12-methyl-3-(propan-2-yl)-4-(prop-2-en-1-yl)-8,9,14,15,24,25,26,26a-octahydro-1H,3H,22H-21,18-(azeno)pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H)-tetrone ; × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	D7Z9F6_ECOLX
Isoform	—
PDB entities	5
Chains and sequence ranges	Author chain M； PDBConstruct 1–201； UniProt 1–201

50S ribosomal protein L3

OrganismNot specified

UniProt P60438

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 5 RNA 2	23S ribosomal RNA × 1 5S ribosomal RNA × 1 50S ribosomal protein L2 × 1 （P60422） 50S ribosomal protein L15 × 1 （A0A037Y8L6） 50S ribosomal protein L4 × 1 （D7Z9F6） 50S ribosomal protein L13 × 1 （D7ZET0） ;(3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-12-methyl-3-(propan-2-yl)-4-(prop-2-en-1-yl)-8,9,14,15,24,25,26,26a-octahydro-1H,3H,22H-21,18-(azeno)pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H)-tetrone ; × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RL3_ECOLI
Isoform	—
PDB entities	6
Chains and sequence ranges	Author chain N； PDBConstruct 1–209； UniProt 1–209

50S ribosomal protein L13

OrganismNot specified

UniProt D7ZET0

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 5 RNA 2	23S ribosomal RNA × 1 5S ribosomal RNA × 1 50S ribosomal protein L2 × 1 （P60422） 50S ribosomal protein L15 × 1 （A0A037Y8L6） 50S ribosomal protein L4 × 1 （D7Z9F6） 50S ribosomal protein L3 × 1 （P60438） ;(3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-12-methyl-3-(propan-2-yl)-4-(prop-2-en-1-yl)-8,9,14,15,24,25,26,26a-octahydro-1H,3H,22H-21,18-(azeno)pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H)-tetrone ; × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	D7ZET0_ECOLX
Isoform	—
PDB entities	7
Chains and sequence ranges	Author chain O； PDBConstruct 1–142； UniProt 1–142

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	6pch
Deposition date deposition_date	2019-06-17
Structure title title	E. coli 50S ribosome bound to compound 21
Keywords keywords	E. coli ribosome, streptogramin A analog, antibiotics, RIBOSOME; RIBOSOME
Experimental Method method	ELECTRON MICROSCOPY

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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.

6pch__assembly_1__model_1

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

Download this curve (.dat)

6pch__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

6pch__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	68.57 Å
Rg (electron density)	68.36 Å
Total Rg	68.48 Å
Atom count	72134
Residues	3958
Excluded volume	1044800 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`6pch__assembly_1__model_1`	heptameric （7）	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 (8)

Entity 1 Entity 1 polymer

Description description	23S ribosomal RNA
Molecular weight formula_weight	941795.6 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polyribonucleotide
Chain IDs strand_id	I
Atom count atom_count	72134

GGUUAAGCGACUAAGCGUACACGGUGGAUGCCCUGGCAGUCAGAGGCGAUGAAGGACGUGCUAAUCUGCGAUAAGCGUCGGUAAGGUGAUAUGAACCGUUAUAACCGGCGAUUUCCGAAUGGGGAAACCCAGUGUGUUUCGACACACUAUCAUUAACUGAAUCCAUAGGUUAAUGAGGCGAACCGGGGGAACUGAAACAUCUAAGUACCCCGAGGAAAAGAAAUCAACCGAGAUUCCCCCAGUAGCGGCGAGCGAACGGGGAGCAGCCCAGAGCCUGAAUCAGUGUGUGUGUUAGUGGAAGCGUCUGGAAAGGCGCGCGAUACAGGGUGACAGCCCCGUACACAAAAAUGCACAUGCUGUGAGCUCGAUGAGUAGGGCGGGACACGUGGUAUCCUGUCUGAAUAUGGGGGGACCAUCCUCCAAGGCUAAAUACUCCUGACUGACCGAUAGUGAACCAGUACCGUGAGGGAAAGGCGAAAAGAACCCCGGCGAGGGGAGUGAAAAAGAACCUGAAACCGUGUACGUACAAGCAGUGGGAGCACGCUUAGGCGUGUGACUGCGUACCUUUUGUAUAAUGGGUCAGCGACUUAUAUUCUGUAGCAAGGUUAACCGAAUAGGGGAGCCGAAGGGAAACCGAGUCUUAACUGGGCGUUAAGUUGCAGGGUAUAGACCCGAAACCCGGUGAUCUAGCCAUGGGCAGGUUGAAGGUUGGGUAACACUAACUGGAGGACCGAACCGACUAAUGUUGAAAAAUUAGCGGAUGACUUGUGGCUGGGGGUGAAAGGCCAAUCAAACCGGGAGAUAGCUGGUUCUCCCCGAAAGCUAUUUAGGUAGCGCCUCGUGAAUUCAUCUCCGGGGGUAGAGCACUGUUUCGGCAAGGGGGUCAUCCCGACUUACCAACCCGAUGCAAACUGCGAAUACCGGAGAAUGUUAUCACGGGAGACACACGGCGGGUGCUAACGUCCGUCGUGAAGAGGGAAACAACCCAGACCGCCAGCUAAGGUCCCAAAGUCAUGGUUAAGUGGGAAACGAUGUGGGAAGGCCCAGACAGCCAGGAUGUUGGCUUAGAAGCAGCCAUCAUUUAAAGAAAGCGUAAUAGCUCACUGGUCGAGUCGGCCUGCGCGGAAGAUGUAACGGGGCUAAACCAUGCACCGAAGCUGCGGCAGCGACGCUUAUGCGUUGUUGGGUAGGGGAGCGUUCUGUAAGCCUGCGAAGGUGUGCUGUGAGGCAUGCUGGAGGUAUCAGAAGUGCGAAUGCUGACAUAAGUAACGAUAAAGCGGGUGAAAAGCCCGCUCGCCGGAAGACCAAGGGUUCCUGUCCAACGUUAAUCGGGGCAGGGUGAGUCGACCCCUAAGGCGAGGCCGAAAGGCGUAGUCGAUGGGAAACAGGUUAAUAUUCCUGUACUUGGUGUUACUGCGAAGGGGGGACGGAGAAGGCUAUGUUGGCCGGGCGACGGUUGUCCCGGUUUAAGCGUGUAGGCUGGUUUUCCAGGCAAAUCCGGAAAAUCAAGGCUGAGGCGUGAUGACGAGGCACUACGGUGCUGAAGCAACAAAUGCCCUGCUUCCAGGAAAAGCCUCUAAGCAUCAGGUAACAUCAAAUCGUACCCCAAACCGACACAGGUGGUCAGGUAGAGAAUACCAAGGCGCUUGAGAGAACUCGGGUGAAGGAACUAGGCAAAAUGGUGCCGUAACUUCGGGAGAAGGCACGCUGAUAUGUAGGUGAGGUCCCUCGCGGAUGGAGCUGAAAUCAGUCGAAGAUACCAGCUGGCUGCAACUGUUUAUUAAAAACACAGCACUGUGCAAACACGAAAGUGGACGUAUACGGUGUGACGCCUGCCCGGUGCCGGAAGGUUAAUUGAUGGGGUUAGCGCAAGCGAAGCUCUUGAUCGAAGCCCCGGUAAACGGCGGCCGUAACXAUAACGGUCCUAAGGUAGCGAAAUUCCUUGUCGGGUAAGUUCCGACCUGCACGAAUGGCGUAAUGAUGGCCAGGCUGUCUCCACCCGAGACUCAGUGAAAUUGAACUCGCUGUGAAGAUGCAGUGUACCCGCGGCAAGACGGAAAGACCCCGUGAACCUUUACUAUAGCUUGACACUGAACAUUGAGCCUUGAUGUGUAGGAUAGGUGGGAGGCUUUGAAGUGUGGACGCCAGUCUGCAUGGAGCCGACCUUGAAAUACCACCCUUUAAUGUUUGAUGUUCUAACGUUGACCCGUAAUCCGGGUUGCGGACAGUGUCUGGUGGGUAGUUUGACUGGGGCGGUCUCCUCCUAAAGAGUAACGGAGGAGCACGAAGGUUGGCUAAUCCUGGUCGGACAUCAGGAGGUUAGUGCAAUGGCAUAAGCCAGCUUGACUGCGAGCGUGACGGCGCGAGCAGGUGCGAAAGCAGGUCAUAGUGAUCCGGUGGUUCUGAAUGGAAGGGCCAUCGCUCAACGGAUAAAAGGUACUCCGGGGAUAACAGGCUGAUACCGCCCAAGAGUUCAUAUCGACGGCGGUGUUUGGCACCUCGAUGUCGGCUCAUCACAUCCUGGGGCUGAAGUAGGUCCCAAGGGUAUGGCUGUUCGCCAUUUAAAGUGGUACGCGAGCUGGGUUUAGAACGUCGUGAGACAGUUCGGUCCCUAUCUGCCGUGGGCGCUGGAGAACUGAGGGGGGCUGCUCCUAGUACGAGAGGACCGGAGUGGACGCAUCACUGGUGUUCGGGUUGUCAUGCCAAUGGCACUGCCCGGUAGCUAAAUGCGGAAGAGAUAAGUGCUGAAAGCAUCUAAGCACGAAACUUGCCCCGAGAUGAGUUCUCCCUGACCCUUUAAGGGUCCUGAAGGAACGUUGAAGACGACGACGUUGAUAGGCCGGGUGUGUAAGCGCAGCGAUGCGUUGAGCUAACCGGUACUAAUGAACCGUGAGGCUUAACCUU

Entity 2 Entity 2 polymer

Description description	5S ribosomal RNA
Molecular weight formula_weight	38177.8 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polyribonucleotide
Chain IDs strand_id	J

GCCUGGCGGCCGUAGCGCGGUGGUCCCACCUGACCCCAUGCCGAACUCAGAAGUGAAACGCCGUAGCGCCGAUGGUAGUGUGGGGUCUCCCCAUGCGAGAGUAGGGAACUGCCAGGCA

Entity 3 Entity 3 polymer

Description description	50S ribosomal protein L2
Molecular weight formula_weight	29663.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	K

AVVKCKPTSPGRRHVVKVVNPELHKGKPFAPLLEKNSKSGGRNNNGRITTRHIGGGHKQAYRIVDFKRNKDGIPAVVERLEYDPNRSANIALVLYKDGERRYILAPKGLKAGDQIQSGVDAAIKPGNTLPMRNIPVGSTVHNVEMKPGKGGQLARSAGTYVQIVARDGAYVTLRLRSGEMRKVEADCRATLGEVGNAEHMLRVLGKAGAARWRGVRPTVRGTAMNPVDHPHGGGEGRNFGKHPVTPWGVQTKGKKTRSNKRTDKFIVRRRS

Entity 4 Entity 4 polymer

Description description	50S ribosomal protein L15
Molecular weight formula_weight	15008.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L

MRLNTLSPAEGSKKAGKRLGRGIGSGLGKTGGRGHKGQKSRSGGGVRRGFEGGQMPLYRRLPKFGFTSRKAAITAEIRLSDLAKVEGGVVDLNTLKAANIIGIQIEFAKVILAGEVTTPVTVRGLRVTKGARAAIEAAGGKIEE

Entity 5 Entity 5 polymer

Description description	50S ribosomal protein L4
Molecular weight formula_weight	22121.6 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	M

MELVLKDAQSALTVSETTFGRDFNEALVHQVVVAYAAGARQGTRAQKTRAEVTGSGKKPWRQKGTGRARSGSIKSPIWRSGGVTFAARPQDHSQKVNKKMYRGALKSILSELVRQDRLIVVEKFSVEAPKTKLLAQKLKDMALEDVLIITGELDENLFLAARNLHKVDVRDATGIDPVSLIAFDKVVMTADAVKQVEEMLA

Entity 6 Entity 6 polymer

Description description	50S ribosomal protein L3
Molecular weight formula_weight	22277.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	N

MIGLVGKKVGMTRIFTEDGVSIPVTVIEVEANRVTQVKDLANDGYRAIQVTTGAKKANRVTKPEAGHFAKAGVEAGRGLWEFRLAEGEEFTVGQSISVELFADVKKVDVTGTSKGKGFAGTVKRWNFRTQDATHGNSLSHRVPGSIGQNQTPGKVFKGKKMAGQMGNERVTVQSLDVVRVDAERNLLLVKGAVPGATGSDLIVKPAVKA

Entity 7 Entity 7 polymer

Description description	50S ribosomal protein L13
Molecular weight formula_weight	16050.6 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	O

MKTFTAKPETVKRDWYVVDATGKTLGRLATELARRLRGKHKAEYTPHVDTGDYIIVLNADKVAVTGNKRTDKVYYHHTGHIGGIKQATFEEMIARRPERVIEIAVKGMLPKGPLGRAMFRKLKVYAGNEHNHAAQQPQVLDI

Entity 8 Entity 8 non-polymer

Description description	;(3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-12-methyl-3-(propan-2-yl)-4-(prop-2-en-1-yl)-8,9,14,15,24,25,26,26a-octahydro-1H,3H,22H-21,18-(azeno)pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H)-tetrone ;
Molecular weight formula_weight	553.6 kDa
Source method src_method	syn
Copy count entity_count	1

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6. Fold Classification (SCOP + CATH) 1 domains

CATH v4.4 (1 domains)

Domain ID domain_id	6pchL01
Class class	3 — Alpha Beta
Architecture architecture	100 — Ribosomal Protein L15; Chain: K; domain 2
Topology topology	10 — Ribosomal Protein L15; Chain: K; domain 2
Homologous superfamily homologous superfamily	10 —

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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	2.90 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	23048

E. coli 50S ribosome bound to compound 21

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

50S ribosomal protein L2

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

50S ribosomal protein L15

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

50S ribosomal protein L4

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

50S ribosomal protein L3

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

50S ribosomal protein L13

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

6pch__assembly_1__model_1

6pch__assembly_1__model_1 | I(q)

6pch__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (8)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 polymer

Polymer Polymer

Entity 6 Entity 6 polymer

Polymer Polymer

Entity 7 Entity 7 polymer

Polymer Polymer

Entity 8 Entity 8 non-polymer

6. Fold Classification (SCOP + CATH) 1 domains

CATH v4.4 (1 domains)

7. Citations (1)