Date published: 2026-5-16

1-800-457-3801

SCBT Portrait Logo
Seach Input

IF3 Activators

The protein IF3, or Initiation Factor 3, is a bacterial protein that plays an essential role in the initiation of protein synthesis. In the context of bacterial translation, initiation is a highly regulated process that involves the assembly of the small 30S ribosomal subunit with the messenger RNA (mRNA) and the initiator transfer RNA (tRNA) charged with N-formylmethionine (fMet-tRNA^fMet), which is the first amino acid incorporated into nascent proteins in prokaryotes.

IF3 binds to the small 30S ribosomal subunit and has multiple critical functions. It helps to maintain the 30S subunit in a conformation that is conducive to interacting with mRNA and initiator tRNA. One of IF3's primary roles is to prevent the premature binding of the large 50S ribosomal subunit before the mRNA and initiator tRNA are properly positioned. This ensures that the assembly of the functional 70S initiation complex, comprising the 30S and 50S subunits along with the mRNA and fMet-tRNA^fMet, occurs accurately and efficiently.

Additionally, IF3 plays a role in ensuring the fidelity of translation initiation. It helps in the selection of the correct start codon on the mRNA, usually AUG, and in the discrimination against non-initiator tRNAs, thus preventing the misincorporation of amino acids at the N-terminus of the protein being synthesized. IF3 also facilitates the release of deacylated tRNA from the E site (exit site) of the ribosome, resetting it for the next round of translation initiation.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Gentamicin sulfate

1405-41-0sc-203334
sc-203334A
sc-203334F
sc-203334B
sc-203334C
sc-203334D
sc-203334E
1 g
5 g
50 g
100 g
1 kg
2.5 kg
7.5 kg
$56.00
$179.00
$509.00
$725.00
$1836.00
$2652.00
$6248.00
3
(1)

Aminoglycosides interfere with bacterial protein synthesis and might indirectly affect IF3 function by altering ribosome dynamics.

Tetracycline

60-54-8sc-205858
sc-205858A
sc-205858B
sc-205858C
sc-205858D
10 g
25 g
100 g
500 g
1 kg
$63.00
$94.00
$270.00
$417.00
$634.00
6
(1)

Tetracycline inhibits protein synthesis in bacteria and could influence processes involving IF3.

Chloramphenicol

56-75-7sc-3594
25 g
$90.00
10
(1)

This antibiotic inhibits bacterial protein synthesis and might have an indirect impact on IF3 activity.

Puromycin

53-79-2sc-205821
sc-205821A
10 mg
25 mg
$166.00
$322.00
436
(1)

Puromycin causes premature chain termination during protein synthesis and might affect the function of translation initiation factors.

Fusidic acid

6990-06-3sc-215065
1 g
$292.00
(0)

Fusidic Acid inhibits elongation factor G in bacteria, potentially impacting the overall process of translation including initiation.

Erythromycin

114-07-8sc-204742
sc-204742A
sc-204742B
sc-204742C
5 g
25 g
100 g
1 kg
$57.00
$245.00
$831.00
$1331.00
4
(3)

Macrolides inhibit bacterial protein synthesis and may indirectly affect IF3-related processes.

Neomycin sulfate

1405-10-3sc-3573
sc-3573A
1 g
5 g
$27.00
$35.00
20
(5)

Neomycin disrupts protein synthesis in bacteria and could have an indirect impact on IF3.

Kanamycin

8063-07-8sc-492406
1 g
$500.00
3
(0)

Kanamycin, an aminoglycoside antibiotic, might affect translation initiation processes involving IF3.

Mycophenolate mofetil

128794-94-5sc-200971
sc-200971A
20 mg
100 mg
$37.00
$109.00
1
(1)

Quinupristin works synergistically with Dalfopristin to inhibit bacterial protein synthesis and might influence IF3 activity.