Date published: 2026-4-1

1-800-457-3801

SCBT Portrait Logo
Seach Input

F730047E07Rik Activators

MMS22-like Activators enhance the functional activity of MMS22-like, a protein crucial for the stabilization of the repair complex during homologous recombination (HR), a pathway responsible for the high-fidelity repair of double-strand DNA breaks. The use of PARP inhibitors such as Olaparib, Rucaparib, and PJ34 results in an increase in double-strand DNA breaks due to the prevention of single-strand DNA break repair. This accumulation of DNA damage elevates the need for HR mechanisms, thus enhancing the activity of MMS22-like in the stabilization of the repair complex. Similarly, DNA-PKcs and ATM inhibitors, represented by NU7441 and KU-55933, compromise the efficiency of the non-homologous end joining (NHEJ) repair pathway and the cellular response to DNA damage, respectively. As a consequence, cells become more dependent on HR, where MMS22-like facilitates the processing of repair intermediates and the stabilization of the repair complex.

The inhibition of checkpoint kinases such as ATR and CHK1 with compounds like VE-821 and AZD7762 disrupts proper DNA damage checkpoint activation, increasing the dependency on HR and the function of MMS22-like during replication stress and the maintenance of genomic integrity. The RAD51 inhibitor B02 directly impedes a key protein in homologous recombination, which paradoxically increases the need for other HR proteins, including MMS22-like, to compensate for the impaired RAD51 function. The WEE1 kinase inhibitor MK-1775 forces cells into mitosis with unresolved DNA damage, thus requiring greater MMS22-like activity to facilitate repair before cell division. Caffeine and Nocodazole, although not direct inhibitors of DNA repair, create cellular conditions that intensify the requirement for HR and MMS22-like. Caffeine by indirectly reducing ATM and ATR activities, and Nocodazole by causing cell cycle arrest and an increase in DNA breaks during mitosis, both enhance the need for MMS22-like function to maintain genomic stability.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Olaparib

763113-22-0sc-302017
sc-302017A
sc-302017B
250 mg
500 mg
1 g
$210.00
$305.00
$495.00
10
(1)

Olaparib is a PARP inhibitor that prevents the repair of single-strand DNA breaks, leading to the accumulation of double-strand breaks and increased engagement of homologous recombination repair pathways, where MMS22-like plays a critical role in stabilizing the repair complex.

NU 7441

503468-95-9sc-208107
5 mg
$357.00
10
(2)

NU7441 is a DNA-PKcs inhibitor that impairs non-homologous end joining (NHEJ), shifting the cellular reliance towards homologous recombination for DNA repair, thus enhancing the functional activity of MMS22-like in the repair process.

VE 821

1232410-49-9sc-475878
10 mg
$360.00
(0)

VE-821 is an ATR inhibitor that leads to impaired DNA damage checkpoint activation, resulting in increased reliance on DNA repair proteins like MMS22-like for the resolution of DNA lesions during replication stress.

ATM Kinase Inhibitor

587871-26-9sc-202963
2 mg
$110.00
28
(2)

KU-55933 is an ATM inhibitor that reduces the cellular capacity to respond to DNA damage, thereby increasing the dependency on homologous recombination and subsequently the activity of MMS22-like in DNA repair.

Rucaparib

283173-50-2sc-507419
5 mg
$150.00
(0)

Rucaparib is a PARP inhibitor, like Olaparib, and it increases the burden of double-strand DNA breaks, enhancing the involvement of MMS22-like in homologous recombination repair pathways.

AZD7762

860352-01-8sc-364423
2 mg
$107.00
(1)

AZD7762 is a CHK1 inhibitor that leads to the disruption of DNA damage checkpoints, necessitating the increased activity of homologous recombination proteins like MMS22-like to maintain genomic integrity.

PARP Inhibitor VIII, PJ34

344458-15-7sc-204161
sc-204161A
1 mg
5 mg
$58.00
$142.00
20
(1)

PJ34 is another PARP inhibitor that, by preventing the repair of single-strand breaks, indirectly necessitates the enhanced activity of homologous recombination repair mechanisms, thus enhancing the function of MMS22-like.

RAD51 Inhibitor B02

1290541-46-6sc-507533
10 mg
$95.00
(0)

B02 is a RAD51 inhibitor that impedes RAD51-mediated strand invasion, a step in homologous recombination, increasing the requirement for supporting factors like MMS22-like to stabilize the repair complex.

Caffeine

58-08-2sc-202514
sc-202514A
sc-202514B
sc-202514C
sc-202514D
50 g
100 g
250 g
1 kg
5 kg
$33.00
$67.00
$97.00
$192.00
$775.00
13
(1)

Caffeine indirectly impairs ATM and ATR kinase activities, which are important for the DNA damage response, thereby increasing the need for homologous recombination and the activity of proteins like MMS22-like in the repair process.

Nocodazole

31430-18-9sc-3518B
sc-3518
sc-3518C
sc-3518A
5 mg
10 mg
25 mg
50 mg
$59.00
$85.00
$143.00
$247.00
38
(2)

Nocodazole disrupts microtubule polymerization, leading to cell cycle arrest and increased double-strand DNA breaks during mitosis, which enhances the requirement for MMS22-like in DNA repair to ensure proper chromosomal segregation.