pristinamycin IB

CHEBI:8418 ·resolve ·ANTIBACTERIAL ·EXACT SEEDED

Pristinamycin IB is a class B streptogramin similar to pristinamycin IA, the former containing a N-methyl-4-(methylamino)phenylalanine instead of a N-methyl-4-(dimethylamino)phenylalanine in its class A streptogramin counterpart (one less methyl group). — PMID:15700955

Machine-generated and unreviewed. Identity, structure and cross-references come straight from ChEBI's and CARD's own data; no curator has signed off on this record yet.

Classification

streptogramin antibioticARO:0000026

Strictly broader compounds or drug classes this molecule belongs to.

ARO:0000026 ARO:0000026

Chemical structure

Computed structure properties
Molecular formula	C44H52N8O10
Charge	0
Average mass	852.946 Da
Monoisotopic mass	852.38064 Da
Source	ChEBI
InChIKey	PCOXSOQWQVRJCH-UHFFFAOYSA-N

SMILES

CCC1NC(=O)C(NC(=O)c2ncccc2O)C(C)OC(=O)C(c2ccccc2)NC(=O)C2CC(=O)CCN2C(=O)C(Cc2ccc(NC)cc2)N(C)C(=O)C2CCCN2C1=O

InChI

InChI=1S/C44H52N8O10/c1-5-30-41(58)51-21-10-13-31(51)42(59)50(4)33(23-26-15-17-28(45-3)18-16-26)43(60)52-22-19-29(53)24-32(52)38(55)49-36(27-11-7-6-8-12-27)44(61)62-25(2)35(39(56)47-30)48-40(57)37-34(54)14-9-20-46-37/h6-9,11-12,14-18,20,25,30-33,35-36,45,54H,5,10,13,19,21-24H2,1-4H3,(H,47,56)(H,48,57)(H,49,55)

Also called

Virginiamycin S1 (EXACT_SYNONYM)— aro

Cross-references

Equivalent identifiers for this same structure in other resources.

Source concepts

Every upstream concept that resolved to this record. The merge is the product: this is what shows ChEBI and CARD are describing the same structure.

Upstream concepts merged into this record
Source	Native ID	Label	Minted CURIE	Version
ARO	`ARO:3000675`	pristinamycin IB	`antibioticmech:aro-7b3da3a33a`	2026-08-30

Molecular targets

The molecular entity or process this compound acts on. Each target carries evidence — this is a mechanistic claim, not a classification.

antibiotic sensitive peptidyl transferase (23S rRNA) NUCLEIC_ACID DIRECT_BINDING_TARGET

ARO:3000754

CARD/ARO database assertion; target organism, strain, and assay are not specified. 23S rRNA peptidyl-transferase center is asserted as the target. Evidence status: PRIMARY_EVIDENCE_NEEDED. Source: CARD_ARO 2026-08-30 (retrieved 2026-08-30).

ARO:3000754 (CARD/ARO asserts targeted_by_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)

Resistance mechanisms

24 known routes by which microbes resist this compound, grounded in ARO where CARD models them. Grouped by mechanism type — expand a group to see its determinants.

ANTIBIOTIC_TARGET_ALTERATION 21

ANTIBIOTIC_TARGET_ALTERATION
Determinant	ARO ID	Organism	Gene families	Evidence
Erm(33)	ARO:3000599	not organism-specific	—	ARO:3000599 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
Erm(34)	ARO:3000600	not organism-specific	—	ARO:3000600 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
Erm(35)	ARO:3000604	not organism-specific	—	ARO:3000604 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
Erm(36)	ARO:3000605	not organism-specific	—	ARO:3000605 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
Erm(37)	ARO:3000392	not organism-specific	—	ARO:3000392 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
Erm(38)	ARO:3000601	not organism-specific	—	ARO:3000601 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
Erm(39)	ARO:3000602	not organism-specific	—	ARO:3000602 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
Erm(41)	ARO:3000603	not organism-specific	—	ARO:3000603 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
Erm(51)	ARO:3007033	not organism-specific	—	ARO:3007033 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmA	ARO:3000347	not organism-specific	—	ARO:3000347 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmB	ARO:3000375	not organism-specific	—	ARO:3000375 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmC	ARO:3000250	not organism-specific	—	ARO:3000250 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmD	ARO:3000495	not organism-specific	—	ARO:3000495 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmE	ARO:3000326	not organism-specific	—	ARO:3000326 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmF	ARO:3000498	not organism-specific	—	ARO:3000498 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmG	ARO:3000522	not organism-specific	—	ARO:3000522 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmN	ARO:3000592	not organism-specific	—	ARO:3000592 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmQ	ARO:3000593	not organism-specific	—	ARO:3000593 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmR	ARO:3000594	not organism-specific	—	ARO:3000594 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmT	ARO:3000595	not organism-specific	—	ARO:3000595 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
ErmX	ARO:3000596	not organism-specific	—	ARO:3000596 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)

ANTIBIOTIC_INACTIVATION 3

ANTIBIOTIC_INACTIVATION
Determinant	ARO ID	Organism	Gene families	Evidence
vgbA	ARO:3001307	not organism-specific	—	ARO:3001307 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
vgbB	ARO:3001308	not organism-specific	—	ARO:3001308 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)
vgbC	ARO:3003990	not organism-specific	—	ARO:3003990 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000675 (pristinamycin IB); database assertion, not a primary citation.)

Curation history

SEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources
Seeded from data/raw/ inventories (ARO)
RESEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources
Re-seeded from updated data/raw/ inventories
RESEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources
Re-seeded from updated data/raw/ inventories
RESEEDED_FROM_SOURCES 2026-08-31 · seed_from_sources
Re-seeded from updated data/raw/ inventories

Provenance

Seeded by scripts/seed_from_sources.py from the committed inventories in data/raw/. View the record.