ELIZA

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469466 occurrences (No.35 in the rank) during 5 years in the PubMed. [no cache] 500 found

134) Endosialidases degrade polysialic acid in a processive mode of action, and a model for its mechanism is suggested.

--- ABSTRACT ---

PMID:22851159 DOI:10.1007/128_2012_349

2015 Topics in current chemistry

* Endosialidases: Versatile Tools for the Study of Polysialic Acid.

- Polysialic acid is an α2,8-linked N-acetylneuraminic acid polymer found on the surface of both bacterial and eukaryotic cells. Endosialidases are bacteriophage-borne glycosyl hydrolases that specifically cleave polysialic acid. The crystal structure of an endosialidase reveals a trimeric mushroom-shaped molecule which, in addition to the active site, harbors two additional polysialic acid binding sites. Folding of the protein crucially depends on an intramolecular C-terminal chaperone domain that is proteolytically released in an intramolecular reaction. Based on structural data and previous considerations, an updated catalytic mechanism is discussed. Endosialidases degrade polysialic acid in a processive mode of action, and a model for its mechanism is suggested. The review summarizes the structural and biochemical elucidations of the last decade and the importance of endosialidases in biochemical and medical applications. Active endosialidases are important tools in studies on the biological roles of polysialic acid, such as the pathogenesis of septicemia and meningitis by polysialic acid-encapsulated bacteria, or its role as a modulator of the adhesion and interactions of neural and other cells. Endosialidase mutants that have lost their polysialic acid cleaving activity while retaining their polysialic acid binding capability have been fused to green fluorescent protein to provide an efficient tool for the specific detection of polysialic acid.

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(1)63 of	(12)7 as	(23)3 assessment	(34)2 demonstrated
(2)55 null	(13)6 are	(24)3 fit	(35)2 it
(3)35 for	(14)6 system	(25)3 revealed	(36)2 joints
(4)28 was	(15)5 a	(26)3 showed	(37)2 may
(5)26 to	(16)5 selection	(27)3 systems	(38)2 not
(6)16 and	(17)5 which	(28)3 were	(39)2 results
(7)16 in	(18)5 will	(29)2 allows	(40)2 species
(8)16 is	(19)4 can	(30)2 analyses	(41)2 such
(9)16 with	(20)4 parameters	(31)2 appropriate	(42)2 used
(10)12 that	(21)4 using	(32)2 biological
(11)8 the	(22)4 we	(33)2 consists

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--- WordNet output for model --- =>模型, 作る, 形に表わす, 模範, モデル, 型, 模型の, 模範となる, かたどる, 手本, モデルをする, 手本となる Overview of noun model The noun model has 9 senses (first 7 from tagged texts) 1. (19) model, theoretical account, framework -- (a hypothetical description of a complex entity or process; "the computer program was based on a model of the circulatory and respiratory systems") 2. (11) model -- (a type of product; "his car was an old model") 3. (6) model, poser -- (a person who poses for a photographer or painter or sculptor; "the president didn't have time to be a model so the artist worked from photos") 4. (4) model, simulation -- (representation of something (sometimes on a smaller scale)) 5. (3) exemplar, example, model, good example -- (something to be imitated; "an exemplar of success"; "a model of clarity"; "he is the very model of a modern major general") 6. (1) model, role model -- (someone worthy of imitation; "every child needs a role model") 7. (1) model, example -- (a representative form or pattern; "I profited from his example") 8. mannequin, manikin, mannikin, manakin, fashion model, model -- (a woman who wears clothes to display fashions; "she was too fat to be a mannequin") 9. model, modelling, modeling -- (the act of representing something (usually on a smaller scale)) Overview of verb model The verb model has 6 senses (first 2 from tagged texts) 1. (1) model, pattern -- (plan or create according to a model or models) 2. (1) model, mold, mould -- (form in clay, wax, etc; "model a head with clay") 3. model, pose, sit, posture -- (assume a posture as for artistic purposes; "We don't know the woman who posed for Leonardo so often") 4. model -- (display (clothes) as a mannequin; "model the latest fashion") 5. model, simulate -- (create a representation or model of; "The pilots are trained in conditions simulating high-altitude flights") 6. model, mock up -- (construct a model of; "model an airplane") Overview of adj model The adj model has 1 sense (first 1 from tagged texts) 1. (1) exemplary, model -- (worthy of imitation; "exemplary behavior"; "model citizens") --- WordNet end ---