how the ubiquitin–proteasome system controls transcription
... establishes the mechanism through which uH2B contributes to gene silencing, and indicates that histone ubiquitylation is an integral part of the HISTONE CODE25 that cells use to distinguish transcriptionally active from inactive chromatin. But how does ubiquitylation regulate other histone modificat ...
... establishes the mechanism through which uH2B contributes to gene silencing, and indicates that histone ubiquitylation is an integral part of the HISTONE CODE25 that cells use to distinguish transcriptionally active from inactive chromatin. But how does ubiquitylation regulate other histone modificat ...
Maturation-promoting Factor Induces Nuclear Envelope Breakdown
... nuclei during the early cleavage stage of Xenopus laevis development. When protein synthesis is inhibited by cycloheximide during this stage, the embryonic cell cycle arrests in an artificially produced G2 phase-like state, after completion of one additional round of DNA synthesis. Approximately 100 ...
... nuclei during the early cleavage stage of Xenopus laevis development. When protein synthesis is inhibited by cycloheximide during this stage, the embryonic cell cycle arrests in an artificially produced G2 phase-like state, after completion of one additional round of DNA synthesis. Approximately 100 ...
Dynamics of Phragmoplastin in Living Cells during
... at the morphological level. A variety of drugs that affect cell plate formation, for example, caffeine (Bonsignore and Hepler, 1985) and taxo1 (Yasuhara et al., 1993), has also been used to study this process. However, the involvement of various cellular components and the molecular mechanism of cel ...
... at the morphological level. A variety of drugs that affect cell plate formation, for example, caffeine (Bonsignore and Hepler, 1985) and taxo1 (Yasuhara et al., 1993), has also been used to study this process. However, the involvement of various cellular components and the molecular mechanism of cel ...
SURVEY AND SUMMARY Nucleolar responses to DNA double
... This issue was addressed for the first time in two recent studies by the McStay and Greenberg laboratories. The homing endonuclease I-PpoI from Physarum polycephalum was used to induce DSBs within the rDNA repeats. I-PpoI has a 15 base-pair recognition site in the 28S coding sequence of each of the ...
... This issue was addressed for the first time in two recent studies by the McStay and Greenberg laboratories. The homing endonuclease I-PpoI from Physarum polycephalum was used to induce DSBs within the rDNA repeats. I-PpoI has a 15 base-pair recognition site in the 28S coding sequence of each of the ...
microbiology-1st-edition-wessner-test-bank
... signals this change to components in the cell. b) A regulatory protein that turns on/off the expression of certain genes. c) A protein used to signal cell division. d) A short amino acid sequence on the end of a protein that is used for transport of the protein out of the cell. e) A protein in the c ...
... signals this change to components in the cell. b) A regulatory protein that turns on/off the expression of certain genes. c) A protein used to signal cell division. d) A short amino acid sequence on the end of a protein that is used for transport of the protein out of the cell. e) A protein in the c ...
Mechanics of the Cvtoskeleton
... cells. Microtubules and actin filaments cooperate to fbrm tensegral structures together with other proteins. (a) Organization of microtubules (M7s) and actin filaments in an expanding cell; ntolecular details o1'the cell wall-plasma menrbrane*cytoskeleton(WMC) continuum are shou'n in (c). (b) Organi ...
... cells. Microtubules and actin filaments cooperate to fbrm tensegral structures together with other proteins. (a) Organization of microtubules (M7s) and actin filaments in an expanding cell; ntolecular details o1'the cell wall-plasma menrbrane*cytoskeleton(WMC) continuum are shou'n in (c). (b) Organi ...
Staining Bacteria
... method to stain bacteria so they can be visible in specimen samples. • Differentiate bacteria into two large groups (the Gram Positive and the Gram negative) • Gram status is important in medicine; the presence or absence of a cell wall will change the bacterium's susceptibility to some antibiotics ...
... method to stain bacteria so they can be visible in specimen samples. • Differentiate bacteria into two large groups (the Gram Positive and the Gram negative) • Gram status is important in medicine; the presence or absence of a cell wall will change the bacterium's susceptibility to some antibiotics ...
pdf: Xu et al. 2008
... suggests a defect in cell wall function. As cortical microtubules have been implicated in regulating anisotropic growth, we examined their arrangement in epidermal cells of wild-type and fei1 fei2 roots using an anti-a-tubulin antibody. In both wild-type and fei1 fei2 double mutant root cells, the m ...
... suggests a defect in cell wall function. As cortical microtubules have been implicated in regulating anisotropic growth, we examined their arrangement in epidermal cells of wild-type and fei1 fei2 roots using an anti-a-tubulin antibody. In both wild-type and fei1 fei2 double mutant root cells, the m ...
Sensitizing B Cells for TLR2 Ligands Cell
... TLR2 (22–24, 32, 33), a receptor belonging to a family of pattern recognition receptors that share the characteristic TIR (Toll/IL-1 receptor) domain and two common signaling pathways via the key signaling molecules MyD88 and/or TRIF (34). The demonstration that peptidoglycan-derived TLR2 activity i ...
... TLR2 (22–24, 32, 33), a receptor belonging to a family of pattern recognition receptors that share the characteristic TIR (Toll/IL-1 receptor) domain and two common signaling pathways via the key signaling molecules MyD88 and/or TRIF (34). The demonstration that peptidoglycan-derived TLR2 activity i ...
Role of the p53 Tumor Suppressor Gene in Cell Cycle Arrest and
... tumor cells (1-3). The COOH-terminal region of p53 contains nuclear localization sequences and a domain that is important for oligomer- ...
... tumor cells (1-3). The COOH-terminal region of p53 contains nuclear localization sequences and a domain that is important for oligomer- ...
Signaling
... e) Janus family of non-receptor TK s also bind some receptors receptors i) growth hormone receptors ii) prola ctin receptors iii) some cytokine receptors ...
... e) Janus family of non-receptor TK s also bind some receptors receptors i) growth hormone receptors ii) prola ctin receptors iii) some cytokine receptors ...
A myosin inhibitor impairs auxin
... related proteins. This would therefore interfere indirectly with myosins but also with other proteins via different signal pathways (Grabski et al. 1998). Moreover, a possible impact of BDM on calcium channels has been discussed for animal cells (Sellin and McArdle 1994). Nevertheless, BDM has been ...
... related proteins. This would therefore interfere indirectly with myosins but also with other proteins via different signal pathways (Grabski et al. 1998). Moreover, a possible impact of BDM on calcium channels has been discussed for animal cells (Sellin and McArdle 1994). Nevertheless, BDM has been ...
The cortical cytoskeletal network and cell-wall
... Penium margaritaceum (Skidmore College clone Skd-8) was maintained on Woods Hole Medium (Nichols, 1973) supplemented with soil extract (WHS) and grown under the conditions described by Domozych et al. (2007). Log phase cultures (i.e. 7to 14-d-old cultures) were used for all labelling and experiments ...
... Penium margaritaceum (Skidmore College clone Skd-8) was maintained on Woods Hole Medium (Nichols, 1973) supplemented with soil extract (WHS) and grown under the conditions described by Domozych et al. (2007). Log phase cultures (i.e. 7to 14-d-old cultures) were used for all labelling and experiments ...
Resistance Gene-Dependent Activation of a Calcium
... are crucial for activation of early defense responses (Yang et al., 1997; Scheel, 1998). Recent reports have noted the activation of mitogen-activated protein (MAP) kinases after race-specific and nonspecific elicitation (Ligterink et al., 1997; Zhang and Klessig, 1998; Zhang et al., 1998; Romeis et ...
... are crucial for activation of early defense responses (Yang et al., 1997; Scheel, 1998). Recent reports have noted the activation of mitogen-activated protein (MAP) kinases after race-specific and nonspecific elicitation (Ligterink et al., 1997; Zhang and Klessig, 1998; Zhang et al., 1998; Romeis et ...
Links between DNA Replication, Stem Cells and Cancer
... cells maintaining that tissue’s homeostasis [5]. These tissue progenitor cells must arise from the tissue specific stem cells produced during embryonic development (discussed below). The lifetime risk for cancer was plotted against the number of stem cell divisions in 31 tissue types for which stem ...
... cells maintaining that tissue’s homeostasis [5]. These tissue progenitor cells must arise from the tissue specific stem cells produced during embryonic development (discussed below). The lifetime risk for cancer was plotted against the number of stem cell divisions in 31 tissue types for which stem ...
mTORC1 regulates the efficiency and cellular capacity for protein
... Authors Journal compilation ...
... Authors Journal compilation ...
Mechanism of Inhibition of Cell Proliferation by
... Vinca alkaloids inhibit cell proliferation primarily by means of their effects on mitotic spindle microtubules or by another mechanism or by a combination of mechanisms. Five Vìnca alkaloids were used to investigate the relationship in Urla cells between inhibition of cell proliferation and blockag ...
... Vinca alkaloids inhibit cell proliferation primarily by means of their effects on mitotic spindle microtubules or by another mechanism or by a combination of mechanisms. Five Vìnca alkaloids were used to investigate the relationship in Urla cells between inhibition of cell proliferation and blockag ...
1 1 2 3 4 5 Wnt proteins can direct planar cell polarity in
... embryonic tissues (Antic et al., 2010; Borovina et al., 2010; Ciruna et al., 2006; Davey et al., ...
... embryonic tissues (Antic et al., 2010; Borovina et al., 2010; Ciruna et al., 2006; Davey et al., ...
2) A dynamic cell adhesion surface regulates tissue architecture in
... growth plate with a central resting zone flanked by two sets of maturation zones, creating bone growth in two opposing directions simultaneously. The zones, in order of increasing maturity, are the resting [R], proliferative [P], prehypertrophic [PH] and hypertrophic [H] zones. This is confirmed wit ...
... growth plate with a central resting zone flanked by two sets of maturation zones, creating bone growth in two opposing directions simultaneously. The zones, in order of increasing maturity, are the resting [R], proliferative [P], prehypertrophic [PH] and hypertrophic [H] zones. This is confirmed wit ...
Intercellular adhesion and cell separation in plants
... Why do epidermal cells not adhere on contact? When two leaves or stems of the same plant come into chance contact they do not fuse, but remain distinct. Likewise pollen tubes that germinate on an epidermal surface other than the stigma do not interact with it. However during flower formation in many ...
... Why do epidermal cells not adhere on contact? When two leaves or stems of the same plant come into chance contact they do not fuse, but remain distinct. Likewise pollen tubes that germinate on an epidermal surface other than the stigma do not interact with it. However during flower formation in many ...
Macromolecular biophysics of the plant cell wall: Concepts and
... walls depend on fine details of their macromolecular structure and conformation, and on their highly ordered architecture at scales from a few nanometers (i.e. just above the molecular scale) to several microns. Much of this fine detail is lost when cell-wall polymers are extracted into solution, as ...
... walls depend on fine details of their macromolecular structure and conformation, and on their highly ordered architecture at scales from a few nanometers (i.e. just above the molecular scale) to several microns. Much of this fine detail is lost when cell-wall polymers are extracted into solution, as ...
- Wiley Online Library
... a key role in B-cell mediated adaptive immunity (Senftleben et al., 2001). In addition, atypical activation can occur by means of non-IKK dependent phosphorylation of the IjBs (Fig. 1C), and in the absence of IKK-mediated posttranslational modifications of NFjB subunits (described below), potentiall ...
... a key role in B-cell mediated adaptive immunity (Senftleben et al., 2001). In addition, atypical activation can occur by means of non-IKK dependent phosphorylation of the IjBs (Fig. 1C), and in the absence of IKK-mediated posttranslational modifications of NFjB subunits (described below), potentiall ...
University of Groningen How to get (a)round Pinho, Mariana
... has been postulated that this might require two types of cell wall synthesis machineries, each containing specific PBPs dedicated to either cell elongation or cell division. However, whether two distinct types of machinery do indeed operate at these different sites has not been fully elucidated17. ...
... has been postulated that this might require two types of cell wall synthesis machineries, each containing specific PBPs dedicated to either cell elongation or cell division. However, whether two distinct types of machinery do indeed operate at these different sites has not been fully elucidated17. ...
A Definitive, Rapid Alternative to the Gram Stain Assay
... The Gram stain assay differentiates bacteria into two groups. Gram positive organisms have high levels of peptidoglycan in their cell walls, which retain the primary crystal violet stain and appear purple. The Gram negative cell wall contains small levels of peptidoglycan but also contains an outer ...
... The Gram stain assay differentiates bacteria into two groups. Gram positive organisms have high levels of peptidoglycan in their cell walls, which retain the primary crystal violet stain and appear purple. The Gram negative cell wall contains small levels of peptidoglycan but also contains an outer ...
Nitrogen deficiency inhibits leaf blade growth in Lolium
... choice for unravelling cellular processes underlying growth responses. This is because of the presence of a developmental gradient along the leaf axis that spatially separates cell proliferation from cell expansion and maturation, allowing thus their simultaneous evaluation. Moreover, cell expansion ...
... choice for unravelling cellular processes underlying growth responses. This is because of the presence of a developmental gradient along the leaf axis that spatially separates cell proliferation from cell expansion and maturation, allowing thus their simultaneous evaluation. Moreover, cell expansion ...
Biochemical switches in the cell cycle
A series of biochemical switches control transitions between and within the various phases of the cell cycle. The cell cycle is a series of complex, ordered, sequential events that control how a single cell divides into two cells, and involves several different phases. The phases include the G1 and G2 phases, DNA replication or S phase, and the actual process of cell division, mitosis or M phase. During the M phase, the chromosomes separate and cytokinesis occurs.The switches maintain the orderly progression of the cell cycle and act as checkpoints to ensure that each phase has been properly completed before progression to the next phase. For example, Cdk, or cyclin dependent kinase, is a major control switch for the cell cycle and it allows the cell to move from G1 to S or G2 to M by adding phosphate to protein substrates. Such multi-component (involving multiple inter-linked proteins) switches have been shown to generate decisive, robust (and potentially irreversible) transitions and trigger stable oscillations. As a result, they are a subject of active research that tries to understand how such complex properties are wired into biological control systems.