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Difference between revisions of "Template:News"

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'''17 December 2023:''' ''Redox-assisted glycoside hydrolysis.'' 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]] 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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'''1 November 2024:''' ''Is this a CAZypedia world record? 6 CAZypedia families in one fell swoop!'' The '''[[CBM47]], [[CBM70]], [[CBM96]], [[CBM105]], [[CBM106]] and [[PL44]]''' ''CAZypedia'' pages are now flipped to curator approved. What do these diverse families from diverse origins with diverse binding specificities have in common?  Astonishingly, at least one characterized member from each family interacts with a charged glycan! '''[[User:Wenwen Tao|Wenwen Tao]]''' authored the [[CBM47]], [[CBM96]] and [[CBM106]] pages, '''[[User:Menghui Sun|Menghui Sun]]''' authored the [[CBM70]] page, '''[[User:Guanchen Liu|Guanchen Liu]]''' authored the [[CBM105]] page and '''[[User:Jinhang Zhou|Jinhang Zhou]]''' authored the [[PL44]] page. All this under the responsible curatorship of '''[[User:Yaoguang Chang|Yaoguang Chang]]'''. Dive into these diverse CBMs on their respective ''CAZypedia'' pages: '''[[CBM47]], [[CBM70]], [[CBM96]], [[CBM105]], [[CBM106]] and [[PL44]]!'''
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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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'''25 October 2024:''' ''Laminariawesome!'' Check out two new marine families of CBMs, '''[[CBM102]]''' and '''[[CBM103]]''', now on ''CAZypedia'' which have an ecological role in bacterial degradation of laminarin during phytoplankton blooms.  Some function as surface glycan binding proteins but others have roles in targeting their appended catalytic modules to substrate.  Both pages were [[author]]ed by '''[[User:Marie-Katherin Zuehlke|Marie-Katherin Zühlke]]'''. ''Read up on these environmentally important CBMs on their respective [[CBM102]] and [[CBM103]] pages!''
 
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'''25 June 2023:''' ''Another one from the [https://en.wikipedia.org/wiki/Capybara capybara gut].'' We're pleased to announce that the '''[[Glycoside Hydrolase Family 173]]''' page, written by [[Author]]s '''[[User:Clelton Santos|Clelton Aparecido dos Santos]]''' and '''[[User:Gabriela Persinoti|Gabriela Felix Persinoti]]''' was [[Curator Approved]] by '''[[User:Mario Murakami|Mario Murakami]]''' today. This new family of beta-galactosidases was created through the same study of the capybara gut metagenome by the [[User:Mario Murakami|Murakami group]]  that led to the creation of family [[CBM89]] (''see the June 22nd [[News]] item'').   '''[[GH173]]''' appears to be distantly related to [[GH5]] and [[GH30]] in [[Clan]] GH-A, yet there remain many unknowns about this family and its founding member - ''read more  [[GH173|here]]!''
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'''19 July 2024:''' ''Chalk-up one more for the GTs!'' The '''[[Glycosyltransferase Family 47]]''' page joined the small group of [[Curator Approved]] [[Glycosyltransferase Families]] pages in ''CAZypedia'' today. This entry was [[author]]ed by Ph.D. students '''[[User:Daniel Tehrani|Daniel Tehrani]]''' and '''[[User:Charlie Corulli|Charlie Corulli]]''', and [[Responsible Curator|Curated]] by '''[[User:Breeanna Urbanowicz|Breeanna Urbanowicz]]''' with input from '''[https://ccrc.uga.edu/team/kelley-moremen/ Kelley Moremen]'''. Widely represented in plants, '''[[GT47]]''' members are anomer-[[inverting]] [[glycosyltransferases]], which are involved in the biosynthesis of several cell wall matrix polysaccharides.  Representatives from mammals are involved in heparin biosynthesis.  Correspondingly, members of [[GH47]] have diverse substrate specificities, including the transfer of both anionic and neutral monosaccharides to polysaccharides.  ''This is a great example where two keen Ph.D. students worked with their supervisors to create a valuable page for the scientific community. We encourage others to follow their lead, on your favorite family!''
 
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'''9 July 2024:''' ''Yet another new family of beta-1,2-glucan-active enzymes!'' Today, '''[[User:Masahiro Nakajima|Masahiro Nakajima]]''' [[Curator Approved]] the '''[[Glycoside Hydrolase Family 186]]''' page by '''[[User:Sei Motouchi|Sei Motouchi]]'''. '''[[GH186]]''' is a family of anomer-[[inverting]] enzymes from bacteria, members of which are specific for beta-1,2-glucans.  Intriguingly, although some [[GH186]] members work as classic [[glycoside hydrolases]], others perform transglycosylation by wrapping the sugar chain around in the active-site, to position the 6-OH group of a terminal glucosyl unit for direct attack.  Also notable, [[GH186]] members appear to use an extended chain of water molecules to relay acceptor deprotonation by the [[general base]] residue, ''i.e.'' a [https://en.wikipedia.org/wiki/Grotthuss_mechanism Grotthuss mechanism]. ''Check out the '''[[GH186]]''' page to learn more about these interesting enzymes, and make sure to see the [[GH189]], [[GH144]], and [[GH162]] pages from this same group.''
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'''23 June 2023:''' ''Human milk oligosaccharide metabolism.'' [[Author]] '''[[User:Chihaya Yamada|Chihaya Yamada]]''' and [[Responsible Curator]] '''[[User:Shinya Fushinobu|Shinya Fushinobu]]''' upgraded the '''[[Glycoside Hydrolase Family 136]]''' page to [[Curator Approved]] status today. '''[[GH136]]''' is a family of bacterial lacto-''N''-biosidases that release lacto-''N''-biose I and lactose from lacto-N-tetraose, the main component of human milk oligosaccharides.  These enzymes have a comparatively rare right-handed beta helix fold that more typical of pectin-active [[PL]]s and [[GH]]s. ''Read more about these interesting enzymes and their role in the human gut microbiota [[GH136|here]]!''
 
  
 
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'''22 June 2023:''' ''These [[CBM]]s are sizeable!'' The recently discovered xylan-binding '''[[CBM89]]''' family, originating from the capybara gut microbiota, is described by [[Author]]s '''[[User:Mariana Morais|Mariana Abrahão Bueno de Morais]]''' and '''[[User:Gabriela Persinoti|Gabriela Felix Persinoti]]'''. '''[[User:Mario Murakami|Mario Murakami]]''' acted as  [[Responsible Curator]] on the [[CBM89|page]].  '''[[CBM89]]''' members are 600 - 1000 amino acids long which puts them in the upper echelons of CBM sizes - just as the capybara is to the rodent order.  You can check out the write up on these unusually large CBMs on their '''[[CBM89]] ''[[CBM89|CAZypedia]]'' [[CBM89|page]]'''.
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'''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]]'''.  
 
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Revision as of 08:13, 20 November 2024

1 November 2024: Is this a CAZypedia world record? 6 CAZypedia families in one fell swoop! The CBM47, CBM70, CBM96, CBM105, CBM106 and PL44 CAZypedia pages are now flipped to curator approved. What do these diverse families from diverse origins with diverse binding specificities have in common? Astonishingly, at least one characterized member from each family interacts with a charged glycan! Wenwen Tao authored the CBM47, CBM96 and CBM106 pages, Menghui Sun authored the CBM70 page, Guanchen Liu authored the CBM105 page and Jinhang Zhou authored the PL44 page. All this under the responsible curatorship of Yaoguang Chang. Dive into these diverse CBMs on their respective CAZypedia pages: CBM47, CBM70, CBM96, CBM105, CBM106 and PL44!


25 October 2024: Laminariawesome! Check out two new marine families of CBMs, CBM102 and CBM103, now on CAZypedia which have an ecological role in bacterial degradation of laminarin during phytoplankton blooms. Some function as surface glycan binding proteins but others have roles in targeting their appended catalytic modules to substrate. Both pages were authored by Marie-Katherin Zühlke. Read up on these environmentally important CBMs on their respective CBM102 and CBM103 pages!

19 July 2024: Chalk-up one more for the GTs! The Glycosyltransferase Family 47 page joined the small group of Curator Approved Glycosyltransferase Families pages in CAZypedia today. This entry was authored by Ph.D. students Daniel Tehrani and Charlie Corulli, and Curated by Breeanna Urbanowicz with input from Kelley Moremen. Widely represented in plants, GT47 members are anomer-inverting glycosyltransferases, which are involved in the biosynthesis of several cell wall matrix polysaccharides. Representatives from mammals are involved in heparin biosynthesis. Correspondingly, members of GH47 have diverse substrate specificities, including the transfer of both anionic and neutral monosaccharides to polysaccharides. This is a great example where two keen Ph.D. students worked with their supervisors to create a valuable page for the scientific community. We encourage others to follow their lead, on your favorite family!

9 July 2024: Yet another new family of beta-1,2-glucan-active enzymes! Today, Masahiro Nakajima Curator Approved the Glycoside Hydrolase Family 186 page by Sei Motouchi. GH186 is a family of anomer-inverting enzymes from bacteria, members of which are specific for beta-1,2-glucans. Intriguingly, although some GH186 members work as classic glycoside hydrolases, others perform transglycosylation by wrapping the sugar chain around in the active-site, to position the 6-OH group of a terminal glucosyl unit for direct attack. Also notable, GH186 members appear to use an extended chain of water molecules to relay acceptor deprotonation by the general base residue, i.e. a Grotthuss mechanism. Check out the GH186 page to learn more about these interesting enzymes, and make sure to see the GH189, GH144, and GH162 pages from this same group.

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.

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