active site


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active site:

see enzymeenzyme,
biological catalyst. The term enzyme comes from zymosis, the Greek word for fermentation, a process accomplished by yeast cells and long known to the brewing industry, which occupied the attention of many 19th-century chemists.
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active site

[′ak·tiv ′sīt]
(chemistry)
The effective site at which a given heterogeneous catalytic reaction can take place. Also known as active center.
(cell and molecular biology)
The region of an enzyme molecule at which binding with the substrate occurs. Also known as binding site; catalytic site.
References in periodicals archive ?
(a) The bivalent include bivalirudin and lepirudin; bind both to the active site and Exosite 1 (E1) of thrombin.
* When a dNTP pauses in the active site, the polymerase catalyzes formation of a chemical bond between the 3'-OH of the primer (nascent strand) and the innermost (alpha) phosphate of the incoming dNTP.
Unlike the average hydrogen production rate over some time, this local hydrogen production rate contains wealth of information about the active site and can help for understanding of the catalyst surface characteristics and its photocatalytic performance directly.
The Cys-592 (marked as CME 592) is a key residue located at the mobile flap covering the active site, one per each of the six sites in the hexameric molecule [29].
When MAO is used as cocatalyst, PBs with broad MWDs are produced because of the heterogeneous nature of the active sites [2, 3].
Explain that heat, symbolized by the scissors, caused weak hydrogen bonds, symbolized by the rubber band, to break, thus denaturing the enzyme and eliminating its active site.
In all of the liganded forms, the flaps are pulled in toward the bottom of the active site ("closed" form), whereas the structures for the unbound enzyme all adopt a "semi-open" conformation with the flaps shifted away from the triads, but still substantially closed over the active site and in contact with each other, blocking entry to the active site.
First, the structure of the integrase protein complex isn't fully understood, and the "active site" where a drug might attach is shallow.
The active site loop of hTS has a unique conformation resulting from a rotation by 180 [degrees] relative to its orientation in bacterial TSs.
It relates to a chemical compound, called a transition state analogue, with a structure that resembles the transition state of a substrate molecule that can block the active site of a bacterial enzyme.
the remaining facilities will remain open to the local community, therefore, the successful contractor will need to manage an active site and minimise disruption to the centre.
Fracking, also known as hydraulic fracturing, has been the focus of considerable controversy in recent weeks, after a number of earthquakes around the UK's only active site, near Blackpool.

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