A catch bond is a type of noncovalent bond whose dissociation lifetime increases with tensile force applied to the bond. Normally, bond lifetimes are expected to diminish with force.[1] In the case of catch bonds, the lifetime of the bond actually increases up to a maximum before it decreases like in a normal bond. Catch bonds work in a way that is conceptually similar to that of a Chinese finger trap. While catch bonds are strengthened by an increase in force, the force increase is not necessary for the bond to work. Catch bonds were suspected for many years to play a role in the rolling of leukocytes, being strong enough to roll in presence of high forces caused by high shear stresses, while avoiding getting stuck in capillaries where the fluid flow, and therefore shear stress, is low. The existence of catch bonds was debated for many years until strong evidence of their existence was found in bacteria.[2][3] Definite proof of their existence came shortly thereafter in leukocytes.[4]
^Bell GI (May 1978). "Models for the specific adhesion of cells to cells". Science. 200 (4342): 618–27. Bibcode:1978Sci...200..618B. doi:10.1126/science.347575. PMID 347575.
^Thomas WE, Trintchina E, Forero M, Vogel V, Sokurenko EV (June 2002). "Bacterial adhesion to target cells enhanced by shear force". Cell. 109 (7): 913–23. doi:10.1016/S0092-8674(02)00796-1. PMID 12110187. S2CID 14332699.
^Isberg RR, Barnes P (July 2003). "Dancing with the host: Flow-dependent bacterial adhesion". Cell. 110 (1): 1–4. doi:10.1016/s0092-8674(02)00821-8. PMID 12150990.
^Marshall BT, Long M, Piper JW, Yago T, McEver RP, Zhu C (May 2003). "Direct observation of catch bonds involving cell-adhesion molecules". Nature. 423 (6936): 190–3. Bibcode:2003Natur.423..190M. doi:10.1038/nature01605. hdl:311007/15708. PMID 12736689. S2CID 4372032.
A catchbond is a type of noncovalent bond whose dissociation lifetime increases with tensile force applied to the bond. Normally, bond lifetimes are...
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