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	mreB - cell wall structural complex MreBCD, actin-like component MreB
		In E. coli, the yhdA and mreB genes are adjacent to each other on the chromosome.
		The mreC gene is preceded by the mreB gene and by a 65-base-pair spacing sequence containing a palindrome sequence and a possible Shine-Dalgarno sequence.
		The effect of the mreB gene on expression of ftsI, the structural gene for penicillin-binding protein 3, was examined by using an ftsI- lacZ fusion gene on a plasmid.
	www.ihop-net.org /UniPub/iHOP/gg/171662.html (211 words)

	MreB - Wikipedia, the free encyclopedia
		The conservation of protein structure suggests the common ancestry of the cytoskeletal elements actin, found in eukaryotes, and MreB, found in prokaryotes.
		MreB controls the width of rod-shaped bacteria, such as Escherichia coli.
		MreB filaments sit right beneath the bacterial cell membrane and give bacteria a strong, rigid structure, as if the bacterium were being stretched out from the inside.
	en.wikipedia.org /wiki/MreB (225 words)

	About Us
		Formed in 1954 by a group of far-sighted brokers, MREB has seen many changes down through the years, but has remained a strong and viable organization of realtors.
		MREB is dedicated to the beneficial visibility of the industry.
		MREB has strived continuously to keep its members informed and up to date about the numerous changes and events occuring in the industry.
	www.homescanner.com /about_us.htm (88 words)

	NSDL Metadata Record -- <it>Bacillus subtilis </it>actin-like protein MreB influences the positioning of ...
		MreB has a dual role, both in the formation of rod cell shape, and in chromosome segregation, however, its function in cell shape is distinct from that of MreC.
		The localization of MreB was abnormal in cells with decondensed chromosomes, as well as during depletion of Mbl, MreBH and of the MreC/MreD proteins, which we show localize to the cell membrane.
		The functional dependence on MreB of the localization of the replication machinery suggests that the replisome is not anchored at the cell centre, but is positioned in a dynamic manner.
	nsdl.org /mr/1029148 (326 words)

	Use an MREB Realtor
		Intense lobbying efforts with regard to housing issues and concerns of local homeowners are constantly being presented to the appropriate authorities.
		Also presented at this event is MREB’s own Ronald Sanderson Award, given to a Board Member who has volunteered extensively in the community, while maintaining a successful real estate career.
		MREB is dedicated to raising $10,000.00 to sponsor a children’s study lounge.
	www.mreb.ca /notes/use_an_mreb_realtor.htm (307 words)

	Microbe Magazine
		Indeed, the absence of a cytoskeleton was one of the hallmarks used to distinguish bacteria from eukaryotic cells.
		A second important function of the MreB cytoskeleton is to participate in movement of the two newly replicated daughter chromosomes to the opposite poles of a cell.
		Yet a third MreB function is to deliver or maintain certain proteins at the cell poles, according to work from the laboratories of Shapiro, Marcia Goldberg at Harvard University, and Yu-Ling Shih and her collaborators at the University of Connecticut (UC).
	www.asm.org /microbe/index.asp?bid=39592 (1902 words)

	ESRF Highlights 2001
		This showed that on the structural level MreB and actin are the most closely related proteins of the actin family.
		A comparison between a single protofilament of actin and MreB shows that the subunits are in almost identical orientation in the protofilament, resulting in a similar spacing between the monomers (Figure 17).
		Combining the X-ray and electron microscopic data, we conclude that MreB and actin form the same protofilaments when polymerised and that MreB is the bacterial homologue of actin.
	www.esrf.fr /info/science/highlights/2001/life-sciences/LS10.html (629 words)

	Research - Cell and Molecular Biosciences - University of Newcastle
		MreB shares a common prokaryotic ancestor with actin and is present in almost all rod-shaped bacteria.
		Construction of an in-frame deletion of mreB and its complementation by mreB(+) only, in trans, established that the gene is important for maintenance of cell width and cell viability under normal growth conditions, independent of polar effects on downstream genes.
		Propagation of the mreB null mutant in the absence of magnesium and sucrose led to a progressive increase in cell width, culminating in cell lysis.
	www.ncl.ac.uk /camb/research/publication/32778 (366 words)

	The Scientist : Deciphering Protein Evolution
		One of them is called MreB, a protein essential for generating or maintaining the rod shape of many bacteria.
		By examining structural similarities between eukaryotic actin and MreB from Thermotoga maritima, a research team at the Medical Research Council in Cambridge, England recently concluded that the two proteins are more closely related to each other than to other members of the family and undoubtedly share a common ancestor.
		MreB forms filamentous bands that encircle the cell in low helices, like reinforcing hoops.
	www.the-scientist.com /article/display/12724 (1145 words)

	Cell polarity: Polar exploration - Cell Signaling Update - Signaling Gateway
		By analogy to eukaryotic actin, MreB molecules might have an intrinsic polarity, so the spirals they form could be used for the asymmetric localization of molecules required for the development of polar structures.
		Depletion of MreB abolished the polar foci that are usually formed by all four proteins at certain points in the cell cycle, consistent with a role for MreB as a global regulator of polarity.
		MreB must therefore be required for the initial decision that determines which pole of the cell is which.
	www.signaling-gateway.org /update/updates/200407/nrm1447.html (427 words)

	The Assembly of MreB, a Prokaryotic Homolog of Actin -- Esue et al. 280 (4): 2628 -- Journal of Biological Chemistry (Site not responding. Last check: 2007-10-11)
		The Assembly of MreB, a Prokaryotic Homolog of Actin -- Esue et al.
		In the presence of either Ca or Mg, the polymerization rates of MreB were slowed down as shown in C and D, respectively.
		MreB filaments may bind factors that are released upon MreB
	www.jbc.org /cgi/content/full/280/4/2628 (4187 words)

	Pfam 21.0 : MreB_Mbl (Site not responding. Last check: 2007-10-11)
		MreB is known to be a rod shape-determining protein in bacteria and goes to make up the bacterial cytoskeleton.
		MreB crystals also contain proto-filaments, with individual proteins assembling into polymers like F-actin, in the same orientation.
		It is hypothesised therefore, that MreB was the forerunner of actin in early eukaryotes PUBMED:11731313.
	pfam.janelia.org /cgi-bin/getdesc?name=MreB_Mbl (277 words)

	BioMed Central \| Full text \| Bacillus subtilisactin-like protein MreB influences the positioning of the replication ...
		MreB is essential for cell viability, its depletion leads to a defect in chromosome segregation, and ultimately to the formation of round cells, i.e.
		In support of an active role, MreB appears to be associated with the nucleoids, in contrast to Mbl [8], which is thought to be involved in the insertion of new cell wall material into the growing peptide glycan layer [11].
		The depletion of MreB has been shown to lead to a strong defect in chromosome segregation, followed by a loss of rod shape, while the depletion of MreC results in a defect in cell shape, but not in a segregation defect [8,14].
	www.biomedcentral.com /1471-2121/6/10 (5295 words)

	Oct 2, 2003 (Site not responding. Last check: 2007-10-11)
		MreB forms large fibrous helices encircling the cytosol in rod-shaped bacteria and is involved in shape determination.
		MreB crystals contain one-dimensional protofilaments, that when compared to the current model of F-actin, reveal remarkable similarities.
		The subunits are in an identical orientation in the protofilament producing the same longitudinal contact in MreB filaments and F-actin.
	www.bmc.uu.se /bmcseminars/2003/031002.html (268 words)

	MreB is a protein found in bacteria that has been... (Site not responding. Last check: 2007-10-11)
		MreB is a protein found in bacteria that has been...
		"MreB" is a protein found in bacteria that has been identified as a homolog homolog of actin actin.
		MreB contols the width of rod shaped bacteria bacteria.
	www.biodatabase.de /MreB (90 words)

	MRC-LMB: "molecular machines" group pages: main
		MreB, among all proteins of the superfamily, is most closely related to actin in overall size.
		They noted that the MreB proteins are widely distributed among rod-shaped, filamentous, and helical bacteria, suggesting that an MreB cytoskeleton is important to generate a non-spherical shape.
		MreB is extremely similar to actin, more so than any other member of the actin family of proteins looked at so far.
	www2.mrc-lmb.cam.ac.uk /SS/Amos_L/group/frame_MreB.html (824 words)

	Single molecules of the bacterial actin MreB undergo directed treadmilling motion in Caulobacter crescentus.
		From these data, we extract several characteristics of single MreB filaments, including that they are, on average, much shorter than the cell length and that the direction of their polarized assembly seems to be independent of the overall cellular polarity.
		Thus, MreB, like actin, exhibits treadmilling behavior in vivo, and the long MreB structures that have been visualized in multiple bacterial species seem to represent bundles of short filaments that lack a uniform global polarity.
		MreB proteins are bacterial actin homologs involved in cell morphogenesis and various other cellular processes.
	aur.lib.bioinfo.pl /pmid:16829583 (2097 words)

	Microbe Magazine
		Sequence alignments of these proteins demonstrate that MreB is a highly conserved family and that the proteins are very uniform in size and probably in secondary structure.
		These structures reveal a massive conformational change in the protein that could be very important in understanding the role of nucleotide hydrolysis in regulating polymerization, which may have implications for other actins.
		In principle, there are several ways in which control might be exerted.First, Mbl cables could form a rigid cage specifying the shape of the cell membrane from inside, enabling PBPs in the cell wall to make new PG according to this specified shape.
	www.asm.org /microbe/index.asp?bid=23589 (2595 words)

	Localization of MreB in Rhodobacter sphaeroides under Conditions Causing Changes in Cell Shape and Membrane Structure ... (Site not responding. Last check: 2007-10-11)
		MreB may function in chromosome segregation (12, 24).
		MreB is consistent with that previously observed for the protein
		MreB may therefore be part of the divisome.
	jb.asm.org /cgi/content/full/187/1/54 (4684 words)

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