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1
Crescent - Crescentin historia
Crescent - Crescentin historia
::2013/03/18::
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2
Intervista Carolina Crescentin ai Ciak d
Intervista Carolina Crescentin ai Ciak d'oro 2011
::2011/07/29::
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3
Loose Cannons trailer Alessandro Preziosi Carolina Crescentin
Loose Cannons trailer Alessandro Preziosi Carolina Crescentin
::2010/11/03::
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4
354 Allegretto Crescent in the Silverwood Heights area of Saskatoon
354 Allegretto Crescent in the Silverwood Heights area of Saskatoon
::2014/07/04::
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5
522 Kucey Crescent in the Arbor Creek area of Saskatoon
522 Kucey Crescent in the Arbor Creek area of Saskatoon
::2014/07/06::
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6
322 Carr Crescent in the Silverspring area of Saskatoon
322 Carr Crescent in the Silverspring area of Saskatoon
::2014/05/29::
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7
Man arrested after shots fired on Bourquin Crescent in Abbotsford
Man arrested after shots fired on Bourquin Crescent in Abbotsford
::2014/06/03::
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8
355 Atton Crescent in Evergreen
355 Atton Crescent in Evergreen
::2014/06/21::
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9
230 University Crescent in London Ontario - Home For Rent Near Western University and King
230 University Crescent in London Ontario - Home For Rent Near Western University and King's College
::2014/06/03::
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10
Cedarwoods Tower at 1 Cedarwoods Crescent in Kitchener, Ontario.   Realstar Management
Cedarwoods Tower at 1 Cedarwoods Crescent in Kitchener, Ontario. Realstar Management
::2014/03/14::
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11
The Weir on Spadina Crescent in Saskatoon 2011
The Weir on Spadina Crescent in Saskatoon 2011
::2011/03/08::
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12
315 Atton Crescent in Evergreen, Saskatoon
315 Atton Crescent in Evergreen, Saskatoon
::2013/09/05::
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13
322 Dickey Crescent in Pacific Heights
322 Dickey Crescent in Pacific Heights
::2014/07/11::
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14
Project Crescent in SQL Server Code Name "Denali" CTP3: Getting Started
Project Crescent in SQL Server Code Name "Denali" CTP3: Getting Started'
::2011/08/04::
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15
Find the area of the shaded crescent in GSP5
Find the area of the shaded crescent in GSP5
::2014/06/01::
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16
Team Davids of Re/Max Presents Unit 710 - 7 Gale Crescent in St. Catharines
Team Davids of Re/Max Presents Unit 710 - 7 Gale Crescent in St. Catharines
::2014/07/18::
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17
26 Anderson Crescent in the West College Park area of Saskatoon
26 Anderson Crescent in the West College Park area of Saskatoon
::2014/05/06::
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18
730 Comstock Crescent in Brockville
730 Comstock Crescent in Brockville
::2014/06/05::
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19
Homes For Sale in Heritage Bay, The Crescent in Bluffton, SC
Homes For Sale in Heritage Bay, The Crescent in Bluffton, SC
::2014/04/25::
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20
Anne Fry Ormsby Crescent in The Woods Remax Excellence Edmonton
Anne Fry Ormsby Crescent in The Woods Remax Excellence Edmonton
::2014/06/17::
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21
222 Sherry Crescent in the Parkridge area of Saskatoon
222 Sherry Crescent in the Parkridge area of Saskatoon
::2014/07/02::
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22
Drone Aerial Presentation: 998 Cookshire Crescent in Ottawa
Drone Aerial Presentation: 998 Cookshire Crescent in Ottawa
::2014/04/25::
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23
Ice Cream Van 9 Stanley Crescent in Uttoxeter 02
Ice Cream Van 9 Stanley Crescent in Uttoxeter 02
::2014/06/22::
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24
How to Draw a Crescent in Photoshop : Photoshop Tutorials
How to Draw a Crescent in Photoshop : Photoshop Tutorials
::2012/11/07::
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25
Home for Sale - 24 Whitlock Crescent in Ajax by Diane Tobia of REMAX Hallmark Brokerage
Home for Sale - 24 Whitlock Crescent in Ajax by Diane Tobia of REMAX Hallmark Brokerage
::2014/05/23::
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26
59 Felan Crescent in Toronto, Ontario.
59 Felan Crescent in Toronto, Ontario.
::2014/07/03::
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27
Kingston apartments for rent, 1020 Pembridge Crescent, in Kingston, Ontario.   Realstar Management
Kingston apartments for rent, 1020 Pembridge Crescent, in Kingston, Ontario. Realstar Management
::2013/09/12::
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28
Welcome to 49 Acre Heights Crescent in Toronto, Ontario!
Welcome to 49 Acre Heights Crescent in Toronto, Ontario!
::2014/06/04::
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29
Ice Cream Van 9 Stanley Crescent in Uttoxeter 01
Ice Cream Van 9 Stanley Crescent in Uttoxeter 01
::2014/06/22::
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30
The Royal Crescent in Bath, England. The tiny apartments in this Edwardian era complex now sell for
The Royal Crescent in Bath, England. The tiny apartments in this Edwardian era complex now sell for
::2014/05/22::
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31
Saskatoon Homes for Sale - 110 Mahabir Crescent in Evergreen
Saskatoon Homes for Sale - 110 Mahabir Crescent in Evergreen
::2013/08/13::
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32
Will dances popping in front of Royal Crescent in Bath
Will dances popping in front of Royal Crescent in Bath
::2014/04/13::
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33
Triest Crescent in Gordon Head, Victoria BC circa 1974
Triest Crescent in Gordon Head, Victoria BC circa 1974
::2014/04/24::
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34
436 Bendel Crescent in Martensville, SK
436 Bendel Crescent in Martensville, SK
::2014/07/08::
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35
"Sunshine Crescent In My Shadow
"Sunshine Crescent In My Shadow's Eye"
::2014/05/11::
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36
1246 Kingsmead Crescent in Oakville. $579,900  Munn
1246 Kingsmead Crescent in Oakville. $579,900 Munn's School District!
::2014/05/28::
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37
Go Sightseeing The Royal Crescent in Bath for 30 sec
Go Sightseeing The Royal Crescent in Bath for 30 sec
::2014/05/08::
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38
Welcome to 8285 Mundare Crescent in Niagara Falls - Asking $174,900
Welcome to 8285 Mundare Crescent in Niagara Falls - Asking $174,900
::2014/03/21::
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39
Home of Rich and Famous..No.1 Wellington Crescent. in Winnipeg...The White Castle/Izzy Asper
Home of Rich and Famous..No.1 Wellington Crescent. in Winnipeg...The White Castle/Izzy Asper
::2012/06/17::
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40
The Joint - Safety In Numbers (live at The Crescent in Salford)
The Joint - Safety In Numbers (live at The Crescent in Salford)
::2013/12/20::
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41
Welcome to 55 Villandry Crescent in Vaughan, Ontario. For more info visit www.royallepagemaximum.ca
Welcome to 55 Villandry Crescent in Vaughan, Ontario. For more info visit www.royallepagemaximum.ca
::2014/05/06::
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42
Qatar Red Crescent in Lanao Del Sur
Qatar Red Crescent in Lanao Del Sur
::2014/07/10::
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43
Voodoo Glow Skulls - "El Coo Cooi" @ Crescent in PHX 7/19/14
Voodoo Glow Skulls - "El Coo Cooi" @ Crescent in PHX 7/19/14
::2014/07/20::
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44
Break-Ins /Robbery at homes in Floribunda Crescent in Brampton, ON
Break-Ins /Robbery at homes in Floribunda Crescent in Brampton, ON
::2013/08/14::
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45
La Poel, Lake Crescent in Olympic National Park
La Poel, Lake Crescent in Olympic National Park
::2013/12/01::
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46
Lake Crescent in Olympic National Park
Lake Crescent in Olympic National Park
::2014/06/01::
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47
123 Fleming Crescent in Saskatoon - A must see!
123 Fleming Crescent in Saskatoon - A must see!
::2013/11/21::
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48
Portstewart Crescent in the sea!
Portstewart Crescent in the sea!
::2013/12/05::
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49
SOLD!!! Welcome Home to 87 Dewell Crescent in Courtice!
SOLD!!! Welcome Home to 87 Dewell Crescent in Courtice!
::2013/10/12::
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50
Collingwood Model House For Sale 7 Chamberlain Crescent in Creekside $399,900
Collingwood Model House For Sale 7 Chamberlain Crescent in Creekside $399,900
::2013/11/01::
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From Wikipedia, the free encyclopedia
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Crescentin is a protein which is a bacterial relative of the intermediate filaments found in eukaryotic cells. Just as tubulins and actins, the other major cytoskeletal proteins, have prokaryotic homologs in, respectively, the FtsZ and MreB proteins, intermediate filaments are linked to the crescentin protein.

Role in cell shape[edit]

Crescentin was recently discovered in the prokaryote Caulobacter crescentus, an aquatic bacterium which uses its crescent-shaped cells for enhanced motility.[1] The crescentin protein is located on the concave face of these cells and appears to be necessary for their shape, as mutants lacking the protein form rod-shaped cells.[2] To influence the shape of the Caulobacter cells, the helices of crescentin filaments associate with the cytoplasmic side of the cell membrane on one lateral side of the cell. This induces a curved cell shape in younger cells, which are shorter than the helical pitch of crescentin, but induces a spiral shape in older, longer cells.[3]

Protein structure[edit]

Like eukaryotic intermediate filaments, crescentin organizes into filaments and is present in a helical structure in the cell. Crescentin is necessary for both shapes of the Caulobacter prokaryote (vibroid/crescent-shape and helical shape, which it may adopt after a long stationary phase). The crescentin protein has 430 residues; its sequence mostly consists of a pattern of 7 repeated residues which form a coiled-coil structure. The DNA sequence of the protein has sections very similar to the eukaryotic keratin and lamin proteins, mostly involving the coiled-coil structure. Researchers Ausmees et al. recently proved that, like animal intermediate filament proteins, crescentin has a central rod made up of four coiled-coil segments.[4] Both intermediate filament and crescentin proteins have a primary sequence including four α-helical segments along with non-α-helical linker domains. An important difference between crescentin and animal intermediate filament proteins is that crescentin lacks certain consensus sequence elements at the ends of the rod domain which are conserved in animal lamin and keratin proteins.[5]

Assembly of filaments[edit]

Eukaryotic intermediate filament proteins assemble into filaments of 8-15 nm within the cell without the need for energy input, that is, no need for ATP or GTP. Ausmees et al. continued their crescentin research by testing whether the protein could assemble into filaments in this manner in vitro. They found that crescentin proteins were indeed able to form filaments about 10 nm wide, and that some of these filaments organized laterally into bundles, just as eukaryotic intermediate filaments do.[4] The similarity of crescentin protein to intermediate filament proteins suggests an evolutionary linkage between these two cytoskeletal proteins.

References[edit]

  1. ^ Biosciences, Eurekah.com, 2000-2005. Accessed 19 February. 2006 through PubMed.
  2. ^ Møller-Jensen J, Löwe J (February 2005). "Increasing complexity of the bacterial cytoskeleton". Curr. Opin. Cell Biol. 17 (1): 75–81. doi:10.1016/j.ceb.2004.11.002. PMID 15661522. 
  3. ^ Margolin W (March 2004). "Bacterial shape: concave coiled coils curve caulobacter". Curr. Biol. 14 (6): R242–4. doi:10.1016/j.cub.2004.02.057. PMID 15043836. 
  4. ^ a b Ausmees N, Kuhn JR, Jacobs-Wagner C (December 2003). "The bacterial cytoskeleton: an intermediate filament-like function in cell shape". Cell 115 (6): 705–13. doi:10.1016/S0092-8674(03)00935-8. PMID 14675535. 
  5. ^ Herrmann H, Aebi U (2004). "Intermediate filaments: molecular structure, assembly mechanism, and integration into functionally distinct intracellular Scaffolds". Annu. Rev. Biochem. 73: 749–89. doi:10.1146/annurev.biochem.73.011303.073823. PMID 15189158. 
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