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Difference between revisions of "Template:News"

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'''3 February 2024:''' ''A new family of beta-1,2-glucan-cyclizing enzymes.'' A page on the (currently) newest GH family, '''[[Glycoside Hydrolase Family 189]]''', was completed today by [[Author]]s '''[[User:Tomoko Masaike|Tomoko Masaike]]''', '''[[User:Masahiro Nakajima|Masahiro Nakajima]]''', and '''[[User:Nobukiyo Tanaka|Nobukiyo Tanaka]]''' ([[User:Masahiro Nakajima|Masahiro Nakajima]] is the [[Responsible Curator]]). '''[[GH189]]''' is a family of bacterial transglycosylases that comprise a critical domain in cyclic beta-1,2-glucan synthase (CGS), because this domain is responsible for the final cyclization step during the biosynthesis of these key effector molecules.  The discovery of '''[[GH189]]''' builds on similarly exciting work by these authors and their colleagues on beta-1,2-glucan hydrolases in [[GH144]] and [[GH162]], which share a common protein fold with '''[[GH189]]''', but have distinct mechansims. ''Check out the '''[[GH189]]''', [[GH144]], and [[GH162]] pages to learn more about this breakthrough work on beta-1,2-glucan-active enzymes!''
 
'''3 February 2024:''' ''A new family of beta-1,2-glucan-cyclizing enzymes.'' A page on the (currently) newest GH family, '''[[Glycoside Hydrolase Family 189]]''', was completed today by [[Author]]s '''[[User:Tomoko Masaike|Tomoko Masaike]]''', '''[[User:Masahiro Nakajima|Masahiro Nakajima]]''', and '''[[User:Nobukiyo Tanaka|Nobukiyo Tanaka]]''' ([[User:Masahiro Nakajima|Masahiro Nakajima]] is the [[Responsible Curator]]). '''[[GH189]]''' is a family of bacterial transglycosylases that comprise a critical domain in cyclic beta-1,2-glucan synthase (CGS), because this domain is responsible for the final cyclization step during the biosynthesis of these key effector molecules.  The discovery of '''[[GH189]]''' builds on similarly exciting work by these authors and their colleagues on beta-1,2-glucan hydrolases in [[GH144]] and [[GH162]], which share a common protein fold with '''[[GH189]]''', but have distinct mechansims. ''Check out the '''[[GH189]]''', [[GH144]], and [[GH162]] pages to learn more about this breakthrough work on beta-1,2-glucan-active enzymes!''
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'''4 January 2024:''' ''CBM99, CBM100 and CBM101 in one fell swoop!'' Three new CBM families have been added to the ''CAZypedia'' repertoire. Though the families differ in their glycan targets, they share the interesting function of binding to highly complex sulfated marine polymers. '''[[User:Yaoguang Chang|Yaoguang Chang]]''' acted as [[Responsible Curator]] on all three pages. '''[[User:Xuanwei Mei|Xuanwei Mei]]''' [[author]]ed the [[CBM99]] and [[CBM101]] red algal specific pages and '''[[User:Guanchen Liu|Guanchen Liu]]''' authored the [[CBM100]] glycosaminoglycan specific page. ''Learn more about [[CBM99]], [[CBM100]] and [[CBM101]] on their respective pages!''
 
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'''4 January 2024:''' ''More "Fun" from the sea.'' Today, '''[[User:Yaoguang Chang|Yaoguang Chang]]''' [[Curator Approved]] the '''[[Glycoside Hydrolase Family 187]]''' page [[Author]]ed by '''[[User:Jingjing Shen|Jingjing Shen]]'''. The founding member of '''[[GH187]]''' is the alpha-1,3-L-fucanase ("Fun187A") the marine bacterium ''Wenyingzhuangia aestuarii'', which recognizes a specific sulfated motif in sea cucumber fucans.  '''[[GH187]]''' is a small family (<50 members) and there remains much to elucidate regarding catalytic mechanism and enzyme structure. Interest in CAZymes active on marine biomass continues to grow, and we welcome this expansion in ''CAZypedia''. ''Learn more about '''[[GH187|GH187 here!]]'''''
 
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'''17 December 2023:''' ''Redox-assisted glycoside hydrolysis, redux.'' Just before the turn of the new year, '''[[User:Spencer Williams|Spencer Williams]]''' completed the '''[[Glycoside Hydrolase Family 188]]''' page. '''[[GH188]]''' is the latest representative of a growing number of [[Glycoside hydrolases|Glycoside Hydrolase]] families, including [[GH4]], [[GH109]], [[GH177]], and [[GH179]], which use an [[NAD-dependent hydrolysis|NAD-dependent]] oxidation-elimination-addition-reduction cycle to cleave glycosidic bonds. First established ca. 20 years ago in [[GH4]], [[NAD-dependent hydrolysis|this mechanism]] is therefore distinct from the [[Glycoside_hydrolases#Mechanism|canonical Koshland mechanisms]] of glycoside hydrolysis. Notably, because oxidation occurs at C-3 of the sugar ring, followed by elimination at C-1, these enzymes can cleave both alpha- and beta-glycosides! Recently, [[User:Spencer Williams|Spencer]], [[User:Ethan Goddard-Borger|Ethan Goddard-Borger]], and [[User:Gideon Davies|Gideon Davies]] showed that [[NAD-dependent hydrolysis]] also extends to sulfoquinovoside hydrolysis by bacterial '''[[GH188]]''' members, complementing canonical sulfoquinovosidases in [[GH31]]. ''Read more about these remarkable enzymes '''[[GH188|here!]]'''''
 
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'''16 August 2023:''' ''An oldie but a goodie.'' The page for '''[[CBM9]]''', one of the original founding top 10 [[Carbohydrate Binding Module Families]], has been completed by '''[[User:Johan Larsbrink|Johan Larsbrink]]''', who multitasked as both [[Author]] and [[Responsible Curator]]. '''[[CBM9]]''' members are often found in ultra-multimodular, xylan deconstructing, bacterial enzymes, and their cellulose-binding functionality has been exploited as affinity tags in recombinant protein purifications. ''Read more on this historically important [[Carbohydrate-binding modules|CBM]] family '''[[CBM9|here]]'''!''
 
 
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Revision as of 07:08, 2 May 2024

2 May 2024: CBDs I to X... A major milestone! CBM families 1 to 10 are now complete! These are the old CBD (cellulose-binding domain) families, which used to have roman numerals as part of their nomenclature. A special thank you to all the authors and responsible curators who have contributed to this major milestone. Go have a peek at each of these old school families on their respective CAZypedia pages: CBM1, CBM2, CBM3, CBM4, CBM5, CBM6, CBM7, CBM8, CBM9, and CBM10.

11 February 2024: A "BLAST" from the past, with a fresh update. Author Eduardo Moreno Prieto composed a new page on Glycoside Hydrolase Family 119,a family of bacterial amylases, which was Curator Approved by Stefan Janecek and Bernard Henrissat today. The first member of GH119 was characterized in 2006, and through sequence analysis with GH57 members, Janeček and Kuchtová predicted the active-site residues in 2012. Over a decade later, Eduardo, Bernard, and colleagues finally provided critical experimental support for these predictions. Learn more about this history, and especially the relationship between GH119 and GH57, in CAZypedia.

3 February 2024: A new family of beta-1,2-glucan-cyclizing enzymes. A page on the (currently) newest GH family, Glycoside Hydrolase Family 189, was completed today by Authors Tomoko Masaike, Masahiro Nakajima, and Nobukiyo Tanaka (Masahiro Nakajima is the Responsible Curator). GH189 is a family of bacterial transglycosylases that comprise a critical domain in cyclic beta-1,2-glucan synthase (CGS), because this domain is responsible for the final cyclization step during the biosynthesis of these key effector molecules. The discovery of GH189 builds on similarly exciting work by these authors and their colleagues on beta-1,2-glucan hydrolases in GH144 and GH162, which share a common protein fold with GH189, but have distinct mechansims. Check out the GH189, GH144, and GH162 pages to learn more about this breakthrough work on beta-1,2-glucan-active enzymes!

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