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Identification
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.

Structure Thumb
Download: MOL | SDF | SMILES | InChI
Display: 2D Structure | 3D Structure
Synonyms Not Available
Brand names
  • Abbocillin
  • Ayercillin
  • Benzopenicillin
  • Benzylpenicillin
  • Benzylpenicillin G
  • Benzylpenicillinic Acid
  • Bicillin
  • Bicillin L-A
  • Cillora
  • Cilloral
  • Cilopen
  • Compocillin G
  • Cosmopen
  • Crysticillin 300 A.S.
  • Dropcillin
  • Free Benzylpenicillin
  • Free Penicillin G
  • Free Penicillin Ii
  • Galofak
  • Gelacillin
  • Liquacillin
  • Megacillin
  • Pencillin G
  • Penicillin
  • Penicillin G Potassium
  • Penicillin G Potassium in Plastic Container
  • Penicillin G Sodium
  • Penicillin-G Potassium
  • Penicillinic Acid, Benzyl-
  • Pentids
  • Pentids '200'
  • Permapen
  • Pfizerpen
  • Pfizerpen G
  • Pharmacillin
  • Phenylacetamidopenicillanic Acid
  • Pradupen
  • Specilline G
  • Ursopen
  • Wycillin
Brand name mixtures Not Available
Categories
  • Anti-Bacterial Agents
  • Penicillins
CAS number 61-33-6
Weight Average: 334.39
Monoisotopic: 334.098727764
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
Plain Text
IUPAC Name
(2S,5R,6R)-3,3-dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
SMILES
[H][C@]12SC(C)(C)[C@@H](N1C(=O)[C@H]2NC(=O)CC1=CC=CC=C1)C(O)=O
Plain Text
Mass Spec Not Available
Taxonomy
Kingdom Organic
Classes
  • Penicillins
  • Phenethylamines
Substructures
  • Hydroxy Compounds
  • Acetates
  • Amino Ketones
  • Benzene and Derivatives
  • Aliphatic and Aryl Amines
  • Carboxylic Acids and Derivatives
  • Beta Lactams
  • Penicillins
  • Thiazoles
  • Phenethylamines
  • Heterocyclic compounds
  • Aromatic compounds
  • Carboxamides and Derivatives
  • Lactams
  • Azetidines
  • Thiazolidines
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

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.

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

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.
Affected organisms
  • Enteric bacteria and other eubacteria
Pathways Not Available
Pharmacoeconomics
Manufacturers
  • King pharmaceuticals inc
  • Wyeth ayerst laboratories
  • Pfizer laboratories div pfizer inc
  • Teva pharmaceuticals usa inc
  • Mylan pharmaceuticals inc
  • Purepac pharmaceutical co
  • Apothecon sub bristol myers squibb co
  • Apothecon inc div bristol myers squibb
  • App pharmaceuticals llc
  • Consolidated pharmaceutical group inc
  • Gc hanford manufacturing co
  • Eli lilly and co
  • Marsam pharmaceuticals llc
  • Parke davis div warner lambert co
  • Sandoz inc
  • Baxter healthcare corp
  • Ivax pharmaceuticals inc sub teva pharmaceuticals usa
  • Bristol myers squibb spa
  • John d copanos and co inc
  • Pharmacia and upjohn co
Packagers
Dosage forms
Form Route Strength
Powder, for solution Intramuscular
Powder, for solution Intravenous
Powder, for solution Oral
Suspension Oral
Tablet Oral
Prices
Unit description Cost Unit
Penicillin gk 20 million unit 160.26 USD each
Penicillin g na 5 million unit 47.91 USD each
Bicillin C-R (1200000) 2ml Syringe 43.0 USD syringe
Penicillin g k 5 million unit 42.18 USD each
Pfizerpen 20 million unit vial 23.41 USD vial
Penicillin G Sodium 10000000 iu/vial 9.35 USD vial
Pfizerpen 5 million unit vial 7.99 USD vial
Penicillin G Sodium 5000000 iu/vial 5.36 USD vial
Penicillin G Sodium 1000000 iu/vial 2.52 USD vial
Pen g k 3 million unit/50 ml 0.27 USD ml
Pen g k 2 million unit/50 ml 0.26 USD ml
Pen g k 1 million unit/50 ml 0.25 USD ml
Patents Not Available
Properties
State solid
Melting point 214-217oC
Experimental Properties
Property Value Source
water solubility Slightly soluble (210 mg/L) PhysProp
logP 1.5 PhysProp
pKa 2.74 Various sources
Predicted Properties
Property Value Source
water solubility 2.85e-01 g/l ALOGPS
logP 1.92 ALOGPS
logP 1.08 ChemAxon Molconvert
logS -3.07 ALOGPS
pKa 12.12 ChemAxon Molconvert
hydrogen acceptor count 4 ChemAxon Molconvert
hydrogen donor count 2 ChemAxon Molconvert
polar surface area 86.71 ChemAxon Molconvert
rotatable bond count 4 ChemAxon Molconvert
refractivity 84.53 ChemAxon Molconvert
polarizability 33.54 ChemAxon Molconvert
References
Synthesis Reference Not Available
General Reference
  1. Eagle H, Newman E, Musselman AD, Robinson M, Birmingham M: THE RENAL CLEARANCE OF PENICILLINS F, G, K, AND X IN RABBITS AND MAN. J Clin Invest. 1947 Sep;26(5):903-18. Pubmed
External Links
Resource Link
KEGG Drug D02336 Link_out
KEGG Compound C05551 Link_out
PubChem Compound 5904 Link_out
PubChem Substance 46506778 Link_out
ChemSpider 5693 Link_out
ChEBI 18208 Link_out
ChEMBL 18208 Link_out
Therapeutic Targets Database DNC001109 Link_out
PharmGKB PA450842 Link_out
HET PG1 Link_out
Drug Product Database 712981 Link_out
RxList http://www.rxlist.com/cgi/generic3/pengk.htm Link_out
ATC Codes
  • J01CE01
  • S01AA14
  • J01CE02
  • J01CE10
AHFS Codes
  • 08:12.16.04
PDB Entries Not Available
FDA label Not Available
MSDS show (47.7 KB)
Interactions
Drug Interactions Not Available
Food Interactions Not Available
Targets

1. Penicillin-binding protein 3

Pharmacological action: unknown
Actions: inhibitor
UniProt ID: Q2FGH1 Link_out
Gene: pbp3
SNPs: SNPJam Report Link_out

References:
  1. Beise F, Labischinski H, Bradaczek H: On the relationships between molecular conformation, affinity towards penicillin-binding proteins, and biological activity of penicillin G-sulfoxide. Z Naturforsch C. 1988 Sep-Oct;43(9-10):656-64. Pubmed

Transporters

1. Organic cation/carnitine transporter 2

Actions: inhibitor

Sodium-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 Link_out
Gene: SLC22A5 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Ganapathy ME, Huang W, Rajan DP, Carter AL, Sugawara M, Iseki K, Leibach FH, Ganapathy V: beta-lactam antibiotics as substrates for OCTN2, an organic cation/carnitine transporter. J Biol Chem. 2000 Jan 21;275(3):1699-707. Pubmed

2. Oligopeptide transporter, small intestine isoform

Actions: substrate, inhibitor

Proton-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 Link_out
Gene: SLC15A1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Luckner P, Brandsch M: Interaction of 31 beta-lactam antibiotics with the H+/peptide symporter PEPT2: analysis of affinity constants and comparison with PEPT1. Eur J Pharm Biopharm. 2005 Jan;59(1):17-24. Pubmed
  2. Tsuji A: Transporter-mediated Drug Interactions. Drug Metab Pharmacokinet. 2002;17(4):253-74. Pubmed

3. Oligopeptide transporter, kidney isoform

Actions: inhibitor

Proton-coupled intake of oligopeptides of 2 to 4 amino acids with a preference for dipeptides

UniProt ID: Q16348 Link_out
Gene: SLC15A2 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Luckner P, Brandsch M: Interaction of 31 beta-lactam antibiotics with the H+/peptide symporter PEPT2: analysis of affinity constants and comparison with PEPT1. Eur J Pharm Biopharm. 2005 Jan;59(1):17-24. Pubmed

4. Solute carrier family 22 member 6

Actions: inhibitor
UniProt ID: Q4U2R8 Link_out
Gene: hROAT1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Jung KY, Takeda M, Kim DK, Tojo A, Narikawa S, Yoo BS, Hosoyamada M, Cha SH, Sekine T, Endou H: Characterization of ochratoxin A transport by human organic anion transporters. Life Sci. 2001 Sep 21;69(18):2123-35. Pubmed
  2. Takeda M, Khamdang S, Narikawa S, Kimura H, Hosoyamada M, Cha SH, Sekine T, Endou H: Characterization of methotrexate transport and its drug interactions with human organic anion transporters. J Pharmacol Exp Ther. 2002 Aug;302(2):666-71. Pubmed
  3. Hosoyamada M, Sekine T, Kanai Y, Endou H: Molecular cloning and functional expression of a multispecific organic anion transporter from human kidney. Am J Physiol. 1999 Jan;276(1 Pt 2):F122-8. Pubmed
  4. Lu R, Chan BS, Schuster VL: Cloning of the human kidney PAH transporter: narrow substrate specificity and regulation by protein kinase C. Am J Physiol. 1999 Feb;276(2 Pt 2):F295-303. Pubmed
  5. Jariyawat S, Sekine T, Takeda M, Apiwattanakul N, Kanai Y, Sophasan S, Endou H: The interaction and transport of beta-lactam antibiotics with the cloned rat renal organic anion transporter 1. J Pharmacol Exp Ther. 1999 Aug;290(2):672-7. Pubmed
  6. Hasegawa M, Kusuhara H, Sugiyama D, Ito K, Ueda S, Endou H, Sugiyama Y: Functional involvement of rat organic anion transporter 3 (rOat3; Slc22a8) in the renal uptake of organic anions. J Pharmacol Exp Ther. 2002 Mar;300(3):746-53. Pubmed

5. Solute carrier family 22 member 8

Actions: substrate, inhibitor

Plays 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 Link_out
Gene: SLC22A8 Link_out
Protein Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Cha SH, Sekine T, Fukushima JI, Kanai Y, Kobayashi Y, Goya T, Endou H: Identification and characterization of human organic anion transporter 3 expressing predominantly in the kidney. Mol Pharmacol. 2001 May;59(5):1277-86. Pubmed
  2. Jung KY, Takeda M, Kim DK, Tojo A, Narikawa S, Yoo BS, Hosoyamada M, Cha SH, Sekine T, Endou H: Characterization of ochratoxin A transport by human organic anion transporters. Life Sci. 2001 Sep 21;69(18):2123-35. Pubmed
  3. Takeda M, Khamdang S, Narikawa S, Kimura H, Hosoyamada M, Cha SH, Sekine T, Endou H: Characterization of methotrexate transport and its drug interactions with human organic anion transporters. J Pharmacol Exp Ther. 2002 Aug;302(2):666-71. Pubmed
  4. Mori S, Takanaga H, Ohtsuki S, Deguchi T, Kang YS, Hosoya K, Terasaki T: Rat organic anion transporter 3 (rOAT3) is responsible for brain-to-blood efflux of homovanillic acid at the abluminal membrane of brain capillary endothelial cells. J Cereb Blood Flow Metab. 2003 Apr;23(4):432-40. Pubmed
  5. Kusuhara H, Sekine T, Utsunomiya-Tate N, Tsuda M, Kojima R, Cha SH, Sugiyama Y, Kanai Y, Endou H: Molecular cloning and characterization of a new multispecific organic anion transporter from rat brain. J Biol Chem. 1999 May 7;274(19):13675-80. Pubmed
  6. Hasegawa M, Kusuhara H, Sugiyama D, Ito K, Ueda S, Endou H, Sugiyama Y: Functional involvement of rat organic anion transporter 3 (rOat3; Slc22a8) in the renal uptake of organic anions. J Pharmacol Exp Ther. 2002 Mar;300(3):746-53. Pubmed
  7. Ohtsuki S, Kikkawa T, Mori S, Hori S, Takanaga H, Otagiri M, Terasaki T: Mouse reduced in osteosclerosis transporter functions as an organic anion transporter 3 and is localized at abluminal membrane of blood-brain barrier. J Pharmacol Exp Ther. 2004 Jun;309(3):1273-81. Epub 2004 Feb 4. Pubmed
  8. Nagata Y, Kusuhara H, Endou H, Sugiyama Y: Expression and functional characterization of rat organic anion transporter 3 (rOat3) in the choroid plexus. Mol Pharmacol. 2002 May;61(5):982-8. Pubmed

6. Organic cation/carnitine transporter 1

Actions: inhibitor

Sodium-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 Link_out
Gene: SLC22A4 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Yabuuchi H, Tamai I, Nezu J, Sakamoto K, Oku A, Shimane M, Sai Y, Tsuji A: Novel membrane transporter OCTN1 mediates multispecific, bidirectional, and pH-dependent transport of organic cations. J Pharmacol Exp Ther. 1999 May;289(2):768-73. Pubmed

7. Solute carrier family 22 member 11

Actions: inhibitor

Mediates saturable uptake of estrone sulfate, dehydroepiandrosterone sulfate and related compounds

UniProt ID: Q9NSA0 Link_out
Gene: SLC22A11 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Babu E, Takeda M, Narikawa S, Kobayashi Y, Enomoto A, Tojo A, Cha SH, Sekine T, Sakthisekaran D, Endou H: Role of human organic anion transporter 4 in the transport of ochratoxin A. Biochim Biophys Acta. 2002 Jun 12;1590(1-3):64-75. Pubmed
  2. Takeda M, Khamdang S, Narikawa S, Kimura H, Hosoyamada M, Cha SH, Sekine T, Endou H: Characterization of methotrexate transport and its drug interactions with human organic anion transporters. J Pharmacol Exp Ther. 2002 Aug;302(2):666-71. Pubmed

8. Solute carrier organic anion transporter family member 2B1

Actions: substrate

Mediates the Na(+)-independent transport of organic anions such as taurocholate, the prostaglandins PGD2, PGE1, PGE2, leukotriene C4, thromboxane B2 and iloprost

UniProt ID: O94956 Link_out
Gene: SLCO2B1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Tamai I, Nezu J, Uchino H, Sai Y, Oku A, Shimane M, Tsuji A: Molecular identification and characterization of novel members of the human organic anion transporter (OATP) family. Biochem Biophys Res Commun. 2000 Jun 24;273(1):251-60. Pubmed

9. Solute carrier organic anion transporter family member 4A1

Actions: substrate

Mediates 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 Link_out
Gene: SLCO4A1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Tamai I, Nezu J, Uchino H, Sai Y, Oku A, Shimane M, Tsuji A: Molecular identification and characterization of novel members of the human organic anion transporter (OATP) family. Biochem Biophys Res Commun. 2000 Jun 24;273(1):251-60. Pubmed

10. Solute carrier organic anion transporter family member 3A1

Actions: substrate

Mediates 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 Link_out
Gene: SLCO3A1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Tamai I, Nezu J, Uchino H, Sai Y, Oku A, Shimane M, Tsuji A: Molecular identification and characterization of novel members of the human organic anion transporter (OATP) family. Biochem Biophys Res Commun. 2000 Jun 24;273(1):251-60. Pubmed

11. Solute carrier organic anion transporter family member 1B1

Actions: substrate

Mediates 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 Link_out
Gene: SLCO1B1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Tamai I, Nezu J, Uchino H, Sai Y, Oku A, Shimane M, Tsuji A: Molecular identification and characterization of novel members of the human organic anion transporter (OATP) family. Biochem Biophys Res Commun. 2000 Jun 24;273(1):251-60. Pubmed

Carriers
Searched, but no carriers found.
Comments
Drug created on June 13, 2005 07:24 / Updated on September 16, 2011 12:18

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.