Date published: 2026-2-14

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MRTF-B Inhibitors

MRTF-B inhibitors are chemical compounds that target and regulate the activity of the Myocardin-related transcription factor B (MRTF-B), a key co-activator involved in the transcriptional control of various genes. MRTF-B plays an essential role in controlling actin cytoskeleton dynamics and modulating gene expression in response to mechanical and environmental cues. The transcription factor, when activated, interacts with serum response factor (SRF), a transcription factor that binds to specific DNA sequences and promotes the expression of genes involved in cytoskeletal structure, migration, and cell motility. MRTF-B inhibitors specifically disrupt this MRTF-B/SRF interaction or alter MRTF-B's nuclear translocation and activation, thereby affecting gene expression tied to cytoskeletal and cellular architecture without directly altering the DNA sequence or modifying the actin structure.Chemically, MRTF-B inhibitors exhibit a variety of structural scaffolds designed to block the interaction sites between MRTF-B and SRF or to interfere with MRTF-B's localization within the cell. These inhibitors often act by preventing the nuclear accumulation of MRTF-B, sequestering it in the cytoplasm or destabilizing its active conformation. The design of MRTF-B inhibitors typically involves small molecules that can navigate the complex protein-protein interaction landscape, posing significant challenges due to the large surface areas involved in MRTF-B's interactions. The chemical structures of these inhibitors are often optimized for specificity and stability to ensure precise modulation of MRTF-B's activity, with detailed attention to their ability to penetrate cellular membranes and access the nuclear compartment. Understanding the chemistry and biophysical properties of MRTF-B inhibitors is crucial in advancing our understanding of how cytoskeletal regulation is controlled at the molecular level.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

CCG-1423

285986-88-1sc-205241
sc-205241A
1 mg
5 mg
$30.00
$90.00
8
(1)

CCG-1423 is a selective inhibitor of RhoA-mediated signaling, impeding the activation of MRTF-B. By disrupting the RhoA pathway, CCG-1423 modulates the cytoskeletal dynamics and prevents MRTF-B translocation to the nucleus, inhibiting its transcriptional activity.

Y-27632, free base

146986-50-7sc-3536
sc-3536A
5 mg
50 mg
$186.00
$707.00
88
(1)

Y-27632 acts as a ROCK (Rho-associated protein kinase) inhibitor, indirectly affecting MRTF-B through the Rho/ROCK pathway. By suppressing ROCK activity, Y-27632 impedes the downstream signaling that leads to MRTF-B activation, thereby inhibiting its transcriptional regulatory functions.

CCG 203971

1443437-74-8sc-507360
10 mg
$89.00
(0)

CCG-203971 is a specific inhibitor of the serum response factor (SRF), a key regulator of MRTF-B activity. By targeting SRF, CCG-203971 disrupts the transcriptional complex involving MRTF-B, hindering its ability to modulate gene expression and participate in cellular processes.

CK 666

442633-00-3sc-361151
sc-361151A
10 mg
50 mg
$321.00
$1040.00
5
(0)

CK-666 is an Arp2/3 complex inhibitor, disrupting actin polymerization and indirectly affecting MRTF-B function. By impeding the formation of branched actin networks, CK-666 interferes with the cytoskeletal dynamics that regulate MRTF-B activity, leading to inhibition of its transcriptional functions.

BAPTA/AM

126150-97-8sc-202488
sc-202488A
25 mg
100 mg
$138.00
$458.00
61
(2)

BAPTA-AM is a calcium chelator that indirectly influences MRTF-B by modulating intracellular calcium levels. By sequestering calcium ions, BAPTA-AM disrupts the signaling cascades involving calcium-dependent pathways, hindering MRTF-B activation and its subsequent transcriptional activities.

CK-869

388592-44-7sc-507274
5 mg
$163.00
(0)

CK-869 is a selective inhibitor of the ARP2/3 complex, influencing MRTF-B through its impact on actin dynamics. By targeting the Arp2/3 complex, CK-869 disrupts actin polymerization, indirectly inhibiting MRTF-B translocation to the nucleus and its involvement in the transcriptional regulation of target genes.

SMIFH2

340316-62-3sc-507273
5 mg
$140.00
(0)

SMIFH2 is a formin inhibitor that indirectly modulates MRTF-B through its impact on actin polymerization. By inhibiting formin activity, SMIFH2 disrupts the process of actin nucleation and polymerization, affecting the cytoskeletal dynamics that regulate MRTF-B activation and subsequent transcriptional functions.

Wiskostatin

253449-04-6sc-204399
sc-204399A
sc-204399B
sc-204399C
1 mg
5 mg
25 mg
50 mg
$49.00
$124.00
$441.00
$828.00
4
(1)

Wiskostatin is an inhibitor of the Wiskott-Aldrich syndrome protein (WASP), indirectly affecting MRTF-B through its role in actin polymerization. By inhibiting WASP, Wiskostatin disrupts the actin cytoskeleton, interfering with the signaling pathways that regulate MRTF-B activation and subsequent transcriptional functions.