Bacterial chromosome segregation
... to opposite halves of the cell. The G1 phase is the period from the end of cell division to the beginning of the S phase. The eukaryotic cell-cycle nomenclature has been applied to bacteria with some modifications (Helmstetter, 1996). The DNA synthesis phase (S) corresponds to the C period in bacter ...
... to opposite halves of the cell. The G1 phase is the period from the end of cell division to the beginning of the S phase. The eukaryotic cell-cycle nomenclature has been applied to bacteria with some modifications (Helmstetter, 1996). The DNA synthesis phase (S) corresponds to the C period in bacter ...
Regulated trafficking of neurotransmitter transporters: common notes
... cellular redistribution of the various transporters. Probably the most commonly employed technique involves the covalent modification of cell surface proteins with a membrane impermeant biotinylation reagent. After biotiny1 lation, cells are lysed and the biotinylated/cell surface proteins are batch ...
... cellular redistribution of the various transporters. Probably the most commonly employed technique involves the covalent modification of cell surface proteins with a membrane impermeant biotinylation reagent. After biotiny1 lation, cells are lysed and the biotinylated/cell surface proteins are batch ...
Implications for Cancer Biology
... signals, such as growth factors, and less-understood intracellular signals, such as nutrients. Both types of signals regulate a common set of effectors involved in control of cell growth, including the eukaryotic initiation factor 4E (eIF4E) binding protein (4EBP1) and the S6 ribosomal protein kinas ...
... signals, such as growth factors, and less-understood intracellular signals, such as nutrients. Both types of signals regulate a common set of effectors involved in control of cell growth, including the eukaryotic initiation factor 4E (eIF4E) binding protein (4EBP1) and the S6 ribosomal protein kinas ...
Serial endosymbiosis or singular event at the origin of eukaryotes?
... Margulis displayed both an unusual breadth of thinking and a curious blind spot in her discussion of atmospheric chemistry. I can only imagine what stimulating conversations she and her cosmologist husband Carl Sagan must have enjoyed over dinner; but it was certainly unusual for biologists to take ...
... Margulis displayed both an unusual breadth of thinking and a curious blind spot in her discussion of atmospheric chemistry. I can only imagine what stimulating conversations she and her cosmologist husband Carl Sagan must have enjoyed over dinner; but it was certainly unusual for biologists to take ...
Development
... data support a hypothesis that (lipo)chitin oligosaccharides have mitogenic activity in various organisms. We were interested to know whether an intact LCO molecule is a prerequisite to obtaining cortical cell divisions when it is delivered inside the plant tissue or whether a substructure is suffic ...
... data support a hypothesis that (lipo)chitin oligosaccharides have mitogenic activity in various organisms. We were interested to know whether an intact LCO molecule is a prerequisite to obtaining cortical cell divisions when it is delivered inside the plant tissue or whether a substructure is suffic ...
Rab-A2 and Rab-A3 GTPases Define a trans
... 2 online) indicated that the transgenes were expressed in a range of cell types and tissues. In brief, while RAB-A2c and -A2d were expressed in most cells, RAB-A2a and -A2b and RAB-A3 showed more restricted expression patterns. For instance, in the root tips, YFP:RAB-A3 was expressed exclusively in ...
... 2 online) indicated that the transgenes were expressed in a range of cell types and tissues. In brief, while RAB-A2c and -A2d were expressed in most cells, RAB-A2a and -A2b and RAB-A3 showed more restricted expression patterns. For instance, in the root tips, YFP:RAB-A3 was expressed exclusively in ...
Serial killers: ordering caspase activation events in apoptosis
... indicate that caspase -3 and -7 are simultaneously activated by caspase-8.29 Once activated, caspase-3 can then propagate the cascade further by activation of other caspases such as caspase-6 and caspase-2 (Figure 1).29,30 This model seems to fit the majority of CD95L and TNF-initiated cell deaths a ...
... indicate that caspase -3 and -7 are simultaneously activated by caspase-8.29 Once activated, caspase-3 can then propagate the cascade further by activation of other caspases such as caspase-6 and caspase-2 (Figure 1).29,30 This model seems to fit the majority of CD95L and TNF-initiated cell deaths a ...
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... downstream of the Notch pathway in the wing and eye discs, embryonic mesodermal segments, and ovarian follicle cells (Baonza et al., 2000; Adam and Montell, 2004; Tapanes-Castillo and Baylies, 2004; Bhattacharya and Baker, 2009; Spratford and Kumar, 2015). In fact, emc expression appears to be depen ...
... downstream of the Notch pathway in the wing and eye discs, embryonic mesodermal segments, and ovarian follicle cells (Baonza et al., 2000; Adam and Montell, 2004; Tapanes-Castillo and Baylies, 2004; Bhattacharya and Baker, 2009; Spratford and Kumar, 2015). In fact, emc expression appears to be depen ...
Contribution of microtubule growth polarity and flux to spindle
... endosomes entered the nuclear area (Fig. 1L). In addition, the remains of the PPB persisted until spindle initiation (Fig. 1G). Apparently, the NE is first permeable to microtubules and only after NE-breakdown, the nuclear area becomes accessible to larger structures such as endocytic vesicles. Thes ...
... endosomes entered the nuclear area (Fig. 1L). In addition, the remains of the PPB persisted until spindle initiation (Fig. 1G). Apparently, the NE is first permeable to microtubules and only after NE-breakdown, the nuclear area becomes accessible to larger structures such as endocytic vesicles. Thes ...
Test Bank - rsffa.org
... ____ 10. Water, carbon dioxide, oxygen, and some other substances can pass through the cell wall. _________________________ ____ 11. Once equilibrium is reached, roughly equal numbers of molecules move in either direction across a semipermeable membrane, and there is no further change in concentrati ...
... ____ 10. Water, carbon dioxide, oxygen, and some other substances can pass through the cell wall. _________________________ ____ 11. Once equilibrium is reached, roughly equal numbers of molecules move in either direction across a semipermeable membrane, and there is no further change in concentrati ...
Cytoskeletal Motors in Arabidopsis. Sixty
... et al., 2002). The atk1-1 mutation also prevents microtubule accumulation at mitotic spindle poles at early stages of spindle assembly (Marcus et al., 2003). Nevertheless, such an effect on microtubule organization during prometaphase does not affect the ultimate outcome of mitosis (Marcus et al., 2 ...
... et al., 2002). The atk1-1 mutation also prevents microtubule accumulation at mitotic spindle poles at early stages of spindle assembly (Marcus et al., 2003). Nevertheless, such an effect on microtubule organization during prometaphase does not affect the ultimate outcome of mitosis (Marcus et al., 2 ...
NF-kB as a primary regulator of the stress response
... section. The NFKB1 and NFKB2 precursor proteins are unique in that they posses both an N-terminal RHD, which is part of the mature NFKB1-p50/ NFKB2-p52 protein, and C-terminal ankyrin repeat domains. The precursor proteins form stable heterodimers with RelA, c-Rel, RelB, NFKB1-p50, and NFKB2-p52 pro ...
... section. The NFKB1 and NFKB2 precursor proteins are unique in that they posses both an N-terminal RHD, which is part of the mature NFKB1-p50/ NFKB2-p52 protein, and C-terminal ankyrin repeat domains. The precursor proteins form stable heterodimers with RelA, c-Rel, RelB, NFKB1-p50, and NFKB2-p52 pro ...
Document
... Background / Tor, Rapamycin and Nutrients • The yeast Saccharomyces cerevisiae senses and responds to nutrients by adapting growth rate and morphogenic transitions • TOR pathway is a major integrator of nutrient-derived signals in cell growth • TOR = Target of Rapamycin, originally identified by mu ...
... Background / Tor, Rapamycin and Nutrients • The yeast Saccharomyces cerevisiae senses and responds to nutrients by adapting growth rate and morphogenic transitions • TOR pathway is a major integrator of nutrient-derived signals in cell growth • TOR = Target of Rapamycin, originally identified by mu ...
The roles of BRCA1 and BRCA2 and associated proteins in the
... et al., 1998; Xu et al., 1999). The similar genomic instability in BRCA1- and BRCA2-deficient cells and the interaction of both BRCA1 and BRCA2 with RAD51 suggested a functional link between the three proteins in the RAD51-mediated DNA damage repair process. However, while BRCA2 is directly involved ...
... et al., 1998; Xu et al., 1999). The similar genomic instability in BRCA1- and BRCA2-deficient cells and the interaction of both BRCA1 and BRCA2 with RAD51 suggested a functional link between the three proteins in the RAD51-mediated DNA damage repair process. However, while BRCA2 is directly involved ...
Mucolipin 1 channel activity is regulated by protein kinase A
... phosphorylated, although to a much lower extent than the Cterminal tail. Therefore we concentrated on the characterization and relevance of phosphorylation of the MCOLN1 C-terminal tail. To determine whether phosphorylation of the GST–MCOLN1 C-terminal tail occurs on tyrosine or serine/threonine res ...
... phosphorylated, although to a much lower extent than the Cterminal tail. Therefore we concentrated on the characterization and relevance of phosphorylation of the MCOLN1 C-terminal tail. To determine whether phosphorylation of the GST–MCOLN1 C-terminal tail occurs on tyrosine or serine/threonine res ...
Serine/threonine/tyrosine phosphorylation regulates
... TCSs are signal transduction devices that were initially discovered in bacteria (Ninfa & Magasani, 1986; Nixon et al., 1986). They play an important role in signal sensing and response to various stimuli, enabling the organisms to adapt to environmental changes. A typical TCS consists of a histidine ...
... TCSs are signal transduction devices that were initially discovered in bacteria (Ninfa & Magasani, 1986; Nixon et al., 1986). They play an important role in signal sensing and response to various stimuli, enabling the organisms to adapt to environmental changes. A typical TCS consists of a histidine ...
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... the central nervous system along its normal pathway, the segmental nerve (n7). To determine at which developmental stage these defects first become apparent, we immunostained wild-type and NetA mutant embryos with mAb22C10. Late stage 12/early stage 13 wild-type embryos show an early stage of v’ch1 ...
... the central nervous system along its normal pathway, the segmental nerve (n7). To determine at which developmental stage these defects first become apparent, we immunostained wild-type and NetA mutant embryos with mAb22C10. Late stage 12/early stage 13 wild-type embryos show an early stage of v’ch1 ...
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... The understanding of the structural aspects of the plant cell wall has been inspired and guided by biochemical analysis. In our study, simple measurements of the sugar composition of cell walls from the protoplasts suggested gradual changes in the proportion of cell wall polysaccharides, such as pec ...
... The understanding of the structural aspects of the plant cell wall has been inspired and guided by biochemical analysis. In our study, simple measurements of the sugar composition of cell walls from the protoplasts suggested gradual changes in the proportion of cell wall polysaccharides, such as pec ...
Dynamin as a mover and pincher during cell migration and invasion
... which is central to actin reorganization during cell migration. The small GTPase Rac, a protein known to mediate lamellipodium extension (Nobes and Hall, 1995), associates with wave complexes. Although there is no direct physical interaction between dynamin and Rac, several functional interdependenc ...
... which is central to actin reorganization during cell migration. The small GTPase Rac, a protein known to mediate lamellipodium extension (Nobes and Hall, 1995), associates with wave complexes. Although there is no direct physical interaction between dynamin and Rac, several functional interdependenc ...
Lessons on longevity from budding yeast
... The identification of acetic acid as a limiting factor for chronological survival under standard conditions has led to questions regarding the validity of this system as a model for human ageing6,7. Although it seems unlikely that acetic-acid-induced apoptosis has an important role in human ageing, ...
... The identification of acetic acid as a limiting factor for chronological survival under standard conditions has led to questions regarding the validity of this system as a model for human ageing6,7. Although it seems unlikely that acetic-acid-induced apoptosis has an important role in human ageing, ...
Centrosome misorientation mediates slowing of the cell cycle under
... Roy, 2006; Ueishi et al., 2009; McLeod et al., 2010; Michaelson et al., 2010; Choi et al., 2011; O’Brien et al., 2011). Stem cells are characterized by their high proliferation activity, yet how nutrient conditions specifically affect these cell types compared with other, more slowly cycling cell ty ...
... Roy, 2006; Ueishi et al., 2009; McLeod et al., 2010; Michaelson et al., 2010; Choi et al., 2011; O’Brien et al., 2011). Stem cells are characterized by their high proliferation activity, yet how nutrient conditions specifically affect these cell types compared with other, more slowly cycling cell ty ...
Somatic Cytokinesis and Pollen Maturation in Arabidopsis
... of a ring of microtubules and actin filaments, encircles the nucleus at prophase, and determines the future division zone (Mineyuki and Gunning, 1990; Wick, 1991; Mineyuki, 1999). The PPB is removed before chromosome segregation and cytokinesis and therefore cannot contribute directly to the cell pl ...
... of a ring of microtubules and actin filaments, encircles the nucleus at prophase, and determines the future division zone (Mineyuki and Gunning, 1990; Wick, 1991; Mineyuki, 1999). The PPB is removed before chromosome segregation and cytokinesis and therefore cannot contribute directly to the cell pl ...
Transcription-associated recombination in eukaryotes: link between
... TAR and DSB-induced HR are mechanistically different processes with little influence on each other. Our recent data show that there is a differential genetic requirement for the two processes (49). It was found that the RAD51 paralogue XRCC2, which is required for HR induced by a DSB (50), is dispen ...
... TAR and DSB-induced HR are mechanistically different processes with little influence on each other. Our recent data show that there is a differential genetic requirement for the two processes (49). It was found that the RAD51 paralogue XRCC2, which is required for HR induced by a DSB (50), is dispen ...
Budding Yeast for Budding Geneticists: A Primer on the
... between bacteria and human cells in size. They form colonies on agar plates in the laboratory in a few days with no special incubators required. Yeast stocks are maintained by freezing at 280° in glycerol or can be freeze-dried and stored at room temperature for years. In nature, yeasts are found in ...
... between bacteria and human cells in size. They form colonies on agar plates in the laboratory in a few days with no special incubators required. Yeast stocks are maintained by freezing at 280° in glycerol or can be freeze-dried and stored at room temperature for years. In nature, yeasts are found in ...
Mitogen-Activated Protein Kinases and Mitogen
... NH2-terminal kinases 1, 2, and 3 (JNK1/2/3) and 4) ERK5 (Bogoyevitch, 2006; Bogoyevitch and Court, 2004; Whitmarsh, 2006; Zarubin and Han, 2005). MAPKs when phosphorylated on their regulatory threonine and tyrosine residues by their upstream MAPK kinases become activated. Once activated, these MAPKs ...
... NH2-terminal kinases 1, 2, and 3 (JNK1/2/3) and 4) ERK5 (Bogoyevitch, 2006; Bogoyevitch and Court, 2004; Whitmarsh, 2006; Zarubin and Han, 2005). MAPKs when phosphorylated on their regulatory threonine and tyrosine residues by their upstream MAPK kinases become activated. Once activated, these MAPKs ...
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.