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| Name | Penicillin G | |||||||||||||||||||||||||||||||||||||||
| Accession Number | DB01053 (APRD00646) | |||||||||||||||||||||||||||||||||||||||
| Type | small molecule | |||||||||||||||||||||||||||||||||||||||
| Groups | approved | |||||||||||||||||||||||||||||||||||||||
| Description | Penicillin G is narrow spectrum antibiotic used to treat infections caused by susceptible bacteria. It is a natural penicillin antibiotic that is administered intravenously or intramuscularly due to poor oral absorption. Penicillin G may also be used in some cases as prophylaxis against susceptible organisms. Natural penicillins are considered the drugs of choice for several infections caused by susceptible gram positive aerobic organisms, such as Streptococcus pneumoniae, groups A, B, C and G streptococci, nonenterococcal group D streptococci, viridans group streptococci, and non-penicillinase producing staphylococcus. Aminoglycosides may be added for synergy against group B streptococcus (S. agalactiae), S. viridans, and Enterococcus faecalis. The natural penicillins may also be used as first or second line agents against susceptible gram positive aerobic bacilli such as Bacillus anthracis, Corynebacterium diphtheriae, and Erysipelothrix rhusiopathiae. Natural penicillins have limited activity against gram negative organisms; however, they may be used in some cases to treat infections caused by Neisseria meningitidis and Pasteurella. They are not generally used to treat anaerobic infections. Resistance patterns, susceptibility and treatment guidelines vary across regions. |
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| Structure |
Download: MOL | SDF | SMILES | InChI Display: 2D Structure | 3D Structure |
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| Synonyms | Not Available | |||||||||||||||||||||||||||||||||||||||
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| Brand name mixtures | Not Available | |||||||||||||||||||||||||||||||||||||||
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| CAS number | 61-33-6 | |||||||||||||||||||||||||||||||||||||||
| Weight |
Average: 334.39 Monoisotopic: 334.098727764 |
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| Chemical Formula | C16H18N2O4S | |||||||||||||||||||||||||||||||||||||||
| InChI Key | InChIKey=JGSARLDLIJGVTE-MBNYWOFBSA-N | |||||||||||||||||||||||||||||||||||||||
| InChI |
InChI=1S/C16H18N2O4S/c1-16(2)12(15(21)22)18-13(20)11(14(18)23-16)17-10(19)8-9-6-4-3-5-7-9/h3-7,11-12,14H,8H2,1-2H3,(H,17,19)(H,21,22)/t11-,12+,14-/m1/s1
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| IUPAC Name |
(2S,5R,6R)-3,3-dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
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| SMILES |
[H][C@]12SC(C)(C)[C@@H](N1C(=O)[C@H]2NC(=O)CC1=CC=CC=C1)C(O)=O
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| Mass Spec | Not Available | |||||||||||||||||||||||||||||||||||||||
| Taxonomy | ||||||||||||||||||||||||||||||||||||||||
| Kingdom | Organic | |||||||||||||||||||||||||||||||||||||||
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| Substructures |
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| Pharmacology | ||||||||||||||||||||||||||||||||||||||||
| Indication | For use in the treatment of severe infections caused by penicillin G-susceptible microorganisms when rapid and high penicillin levels are required such as in the treatment of septicemia, meningitis, pericarditis, endocarditis and severe pneumonia. | |||||||||||||||||||||||||||||||||||||||
| Pharmacodynamics | Penicillin G is a penicillin beta-lactam antibiotic used in the treatment of bacterial infections caused by susceptible, usually gram-positive, organisms. The name "penicillin" can either refer to several variants of penicillin available, or to the group of antibiotics derived from the penicillins. Penicillin G has in vitro activity against gram-positive and gram-negative aerobic and anaerobic bacteria. The bactericidal activity of penicillin G results from the inhibition of cell wall synthesis and is mediated through penicillin G binding to penicillin binding proteins (PBPs). Penicillin G is stable against hydrolysis by a variety of beta-lactamases, including penicillinases, and cephalosporinases and extended spectrum beta-lactamases. | |||||||||||||||||||||||||||||||||||||||
| Mechanism of action | By binding to specific penicillin-binding proteins (PBPs) located inside the bacterial cell wall, penicillin G inhibits the third and last stage of bacterial cell wall synthesis. Cell lysis is then mediated by bacterial cell wall autolytic enzymes such as autolysins; it is possible that penicillin G interferes with an autolysin inhibitor. | |||||||||||||||||||||||||||||||||||||||
| Absorption | Rapidly absorbed following both intramuscular and subcutaneous injection. Initial blood levels following parenteral administration are high but transient. Oral absorption in fasting, healthy humans is only about 15-30% as it is very susceptible to acid-catalyzed hydrolysis. | |||||||||||||||||||||||||||||||||||||||
| Volume of distribution | 0.53–0.67 L/kg in adults with normal renal function |
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| Protein binding | Bind to serum proteins (45-68%), mainly albumin. | |||||||||||||||||||||||||||||||||||||||
| Metabolism |
About 16-30% of an intramuscular dose is metabolized to penicilloic acid, an inactive metabolite. Small amounts of 6-aminopenicillanic acid have been recovered in the urine of patients on penicillin G. A small percentage of the drug appears to be hydroxylated into one or more active metabolites, which are also excreted via urine. |
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| Route of elimination | Penicillin G is eliminated by the kidneys. Nonrenal clearance includes hepatic metabolism and, to a lesser extent, biliary excretion. | |||||||||||||||||||||||||||||||||||||||
| Half life | In adults with normal renal function is reportedly 0.4–0.9 hours | |||||||||||||||||||||||||||||||||||||||
| Clearance | 560ml/min in healthy humans |
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| Toxicity | Oral LD50 in rat is 8900 mk/kg. Neurological adverse reactions, including convulsions, may occur with the attainment of high CSF levels of beta-lactams. Neutropenia can occur if high doses are administered consistently for over 2 weeks. | |||||||||||||||||||||||||||||||||||||||
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| Pathways | Not Available | |||||||||||||||||||||||||||||||||||||||
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| Patents | Not Available | |||||||||||||||||||||||||||||||||||||||
| Properties | ||||||||||||||||||||||||||||||||||||||||
| State | solid | |||||||||||||||||||||||||||||||||||||||
| Melting point | 214-217oC | |||||||||||||||||||||||||||||||||||||||
| Experimental Properties |
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| Synthesis Reference | Not Available | |||||||||||||||||||||||||||||||||||||||
| General Reference |
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| PDB Entries | Not Available | |||||||||||||||||||||||||||||||||||||||
| FDA label | Not Available | |||||||||||||||||||||||||||||||||||||||
| MSDS | show (47.7 KB) | |||||||||||||||||||||||||||||||||||||||
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| Drug Interactions | Not Available | |||||||||||||||||||||||||||||||||||||||
| Food Interactions | Not Available | |||||||||||||||||||||||||||||||||||||||
| Targets |
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1. Penicillin-binding protein 3 Pharmacological action: unknownActions: inhibitor UniProt ID: Q2FGH1 ![]() Gene: pbp3 SNPs: SNPJam Report ![]() References:
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| Transporters |
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1. Organic cation/carnitine transporter 2 Actions: inhibitorSodium-ion dependent, high affinity carnitine transporter. Involved in the active cellular uptake of carnitine. Transports one sodium ion with one molecule of carnitine. Also transports organic cations such as tetraethylammonium (TEA) without the involvement of sodium. Also Relative uptake activity ratio of carnitine to TEA is 11.3 UniProt ID: O76082![]() Gene: SLC22A5 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
2. Oligopeptide transporter, small intestine isoform Actions: substrate, inhibitorProton-coupled intake of oligopeptides of 2 to 4 amino acids with a preference for dipeptides. May constitute a major route for the absorption of protein digestion end-products UniProt ID: P46059![]() Gene: SLC15A1 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
3. Oligopeptide transporter, kidney isoform Actions: inhibitorProton-coupled intake of oligopeptides of 2 to 4 amino acids with a preference for dipeptides UniProt ID: Q16348![]() Gene: SLC15A2 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
4. Solute carrier family 22 member 6 Actions: inhibitorUniProt ID: Q4U2R8 ![]() Gene: hROAT1 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
5. Solute carrier family 22 member 8 Actions: substrate, inhibitorPlays an important role in the excretion/detoxification of endogenous and exogenous organic anions, especially from the brain and kidney. Involved in the transport basolateral of steviol, fexofenadine. Transports benzylpenicillin (PCG), estrone- 3-sulfate (E1S), cimetidine (CMD), 2,4-dichloro-phenoxyacetate (2,4-D), p-amino-hippurate (PAH), acyclovir (ACV) and ochratoxin (OTA) UniProt ID: Q8TCC7![]() Gene: SLC22A8 ![]() Protein Sequence: FASTA SNPs: SNPJam Report ![]() References:
6. Organic cation/carnitine transporter 1 Actions: inhibitorSodium-ion dependent, low affinity carnitine transporter. Probably transports one sodium ion with one molecule of carnitine. Also transports organic cations such as tetraethylammonium (TEA) without the involvement of sodium. Relative uptake activity ratio of carnitine to TEA is 1.78. A key substrate of this transporter seems to be ergothioneine (ET) UniProt ID: Q9H015![]() Gene: SLC22A4 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
7. Solute carrier family 22 member 11 Actions: inhibitorMediates saturable uptake of estrone sulfate, dehydroepiandrosterone sulfate and related compounds UniProt ID: Q9NSA0![]() Gene: SLC22A11 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
8. Solute carrier organic anion transporter family member 2B1 Actions: substrateMediates the Na(+)-independent transport of organic anions such as taurocholate, the prostaglandins PGD2, PGE1, PGE2, leukotriene C4, thromboxane B2 and iloprost UniProt ID: O94956![]() Gene: SLCO2B1 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
9. Solute carrier organic anion transporter family member 4A1 Actions: substrateMediates the Na(+)-independent transport of organic anions such as the thyroid hormones T3 (triiodo-L-thyronine), T4 (thyroxine) and rT3, and of estrone-3-sulfate and taurocholate UniProt ID: Q96BD0![]() Gene: SLCO4A1 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
10. Solute carrier organic anion transporter family member 3A1 Actions: substrateMediates the Na(+)-independent transport of organic anions such as estrone-3-sulfate (PubMed:10873595). Mediates transport of prostaglandins (PG) E1 and E2, thyroxine (T4), deltorphin II, BQ-123 and vasopressin, but not DPDPE (a derivative of enkephalin lacking an N-terminal tyrosine residue), estrone-3- sulfate, taurocholate, digoxin nor DHEAS (PubMed:16971491) UniProt ID: Q9UIG8![]() Gene: SLCO3A1 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
11. Solute carrier organic anion transporter family member 1B1 Actions: substrateMediates the Na(+)-independent transport of organic anions such as pravastatin, taurocholate, methotrexate, dehydroepiandrosterone sulfate, 17-beta-glucuronosyl estradiol, estrone sulfate, prostaglandin E2, thromboxane B2, leukotriene C3, leukotriene E4, thyroxine and triiodothyronine. May play an important role in the clearance of bile acids and organic anions from the liver UniProt ID: Q9Y6L6![]() Gene: SLCO1B1 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
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| Carriers |
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Searched, but no carriers found.
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| Comments |
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This project is supported by Genome Alberta & Genome Canada, a not-for-profit organization that is leading Canada's national genomics strategy with $600 million in funding from the federal government. This project is also supported in part by GenomeQuest, Inc., an enterprise genomic information company serving the life science community.