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WSWS298

An integrated data resource for C. elegans and related nematodes

Expression Pattern :

Pattern  SCC-1/COH-2 was expressed in germ cells throughout the development, including the adult stage. SCC-1/COH-2 was detected in virtually all mitotic germ nuclei. Similarly to somatic cells in embryos, SCC-1/COH-2 was dispersed in the cytoplasm at mitotic prometaphase and was absent from the condensed anaphase chromosomes in germ cells. In female germ cells that entered meiotic prophase in adult hermaphrodites, SCC-1/COH-2 was observed uniformly in the nuclei. It was unclear whether SCC-1/COH-2 localized to the condensed meiotic chromosomes, because of the strong SCC-1/COH-2 signal emitted from the nucleoplasm. SCC-1/COH-2 was detected also in male germ cells at mitosis and meiosis, but it was not detectable in mature sperm. SCC-1/COH-2 was strongly expressed in virtually all cells in early embryos, but its expression was gradually weakened, and the signal could hardly be detected in late embryos, in which cell division was ceased almost completely. Strong nuclear signals of SCC-1/COH-2 reappeared in larvae, though they were limited to a subset of cells. SCC-1/COH-2 was detectable only in cells that were going to divide. For example, in an L1 larva, intense SCC-1/COH-2 signals were detected in the 14 hypodermal V lineage cells, which divide synchronously. The SCC-1/COH-2 signal was dispersed and not detectable on condensed chromosomes, as observed in embryos of an intermediate stage. In a slightly older L1 larva, expression of SCC-1/COH-2 was seen in 22 P lineage cells to constitute the ventral nerve cord and in four Q lineage cells to produce posterior neuronal cells, all of which divide at the same time. In this L1 larva, no signal was detected in the V lineage cells, suggesting that the SCC-1/COH-2 protein is present only for a short time in the cell cycle, and likely to be degraded quickly after cell division. Larvae of later stages also expressed SCC-1/COH-2 in dividing cells: in an L3 larva, SCC-1/COH-2 was detected in four M lineage cells to produce the uterine and vulval muscle cells and in 10 P lineage vulval precursor cells, which divide concurrently. The embryos were stained with both anti-SCC-1/COH-2 antibodies and an antibody against a component of the nuclear pore complexes. The SCC-1/COH-2 signal was evenly distributed within the nuclear envelope except for the chromosomal region, suggesting that SCC-1/COH-2 molecules dissociated from the chromosomes at metaphase were trapped by the nuclear envelope. Consistently with this interpretation, the SCC-1/COH-2 staining around the metaphase plate was no longer seen at later stages of embryogenesis involving >30 cells, where nuclear envelope is known to break down before metaphase. SCC-1/COH-2 was dispersed into the whole cytoplasm of metaphase cells at these stages. Primary Identifier  Expr2579
Subcellular Localization  SCC-1/COH-2 seemed to localize to the chromosomes in a cell cycle-dependent manner. In interphase, SCC-1/COH-2 was seen throughout the nucleus, overlapping largely with DNA. At mitotic prophase, SCC-1/COH-2 started to separate from condensing chromosomes, and it was not detected on the chromosomes at prometaphase and metaphase. At metaphase, the SCC-1/COH-2 signal seemed as if surrounding the metaphase plate, although it was possible that a small amount of SCC-1/COH-2 was remaining on the metaphase chromosomes but escaped detection, because cohesin is reported to become detectable on metaphase chromosomes only after detergent extraction of soluble background in other metazoans. The SCC-1/COH-2 signal was then dispersed in the cytoplasm at anaphase. At telophase, the SCC-1/COH-2 protein began to reaccumulate on the chromosomes.
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79 Anatomy Terms

Definition Name Synonym Primary Identifier
a large process bundle that runs along the vental mid-line extending from the ventral region of the nerve ring. ventral nerve cord ventral cord WBbt:0005829
cell line which early in development becomes differentiated from the remaining somatic cell line, and alone has the potential to undergo meiosis and form gametes. germ line germline WBbt:0005784
Ant. lateral interneuron, process projects into ring SDQR lineage name: QR.pap WBbt:0004991
Neuron class of one neuron, posterior ventral microtuble cell, touch receptor. PVM lineage name: QL.paa WBbt:0004086
Neuron class of one sensory neuron, anterior ventral microtubule cell, touch receptor. AVM lineage name: QR.paa WBbt:0003832
cell that has the potential to form structural part of a vulva. vulval precursor cell VPC WBbt:0007809
embryonic cell MSa   WBbt:0006086
embryonic cell MSp   WBbt:0005912
Embryonic founder cell MS lineage name: P0.paa WBbt:0004458
embryonic cell ABarp   WBbt:0006653
embryonic cell ABprp   WBbt:0006451
embryonic cell Ep   WBbt:0006612
embryonic cell ABplp   WBbt:0006279
embryonic cell ABalp   WBbt:0005865
Embryonic founder cell E lineage name: P0.pap WBbt:0004804
Single cell zygote P0 lineage name: Z WBbt:0004422
embryonic cell MSpa   WBbt:0006142
embryonic founder cell Psub3 lineage name: P0.ppp WBbt:0006875
embryonic cell Cpa   WBbt:0006281
embryonic founder cell Psub1 lineage name: P0.p WBbt:0006874
embryonic founder cell Psub2 lineage name: P0.pp WBbt:0006873
Embryonic founder cell D lineage name: P0.pppa WBbt:0004873
embryonic cell MSpp   WBbt:0006255
Embryonic founder cell of germ line Psub4 lineage name: P0.pppp WBbt:0004421
embryonic cell EMS   WBbt:0006876
embryonic cell ABplap   WBbt:0006096
embryonic cell ABalap   WBbt:0006101
embryonic cell ABala   WBbt:0006707
embryonic cell ABarap   WBbt:0005903
embryonic cell ABal   WBbt:0006110

1 Genes

WormBase Gene ID Gene Name Sequence Name Organism
WBGene00004737 scc-1 F10G7.4 Caenorhabditis elegans

8 Life Stages

Remark Definition Other Name Public Name Primary Identifier
  The stage that begins when a C.elegans individual is fully-developed and has reached maturity. adult Ce WBls:0000041
  The third stage larva. At 25 Centigrade, it ranges 32.5-40 hours after fertilization, 18.5-26 hours after hatch. L3 larva Ce WBls:0000035
  The second stage larva. At 25 Centigrade, it ranges 25.5-32.5 hours after fertilization, 11.5-18.5 hours after hatch. L2 larva Ce WBls:0000027
  The fourth stage larva. At 25 Centigrade, it ranges 40-49.5 hours after fertilization, 26-35.5 hours after hatch. L4 larva Ce WBls:0000038
  The first stage larva. At 25 Centigrade, it ranges 14-25.5 hours after fertilization, 0-11.5 hours after hatch. L1 larva Ce WBls:0000024
  The C. elegans life stage spanning 350-620min after first cleavage at 20 Centigrade. Cell number remains at ~560 cells, with some new cells generated and some cells go through programmed cell death. The stage that embryo starts elongation until elongation is over. elongating embryo Ce WBls:0000015
  The C. elegans life stage spanning 0-350min after first cleavage at 20 Centigrade. Proliferate from 1 cell to 560 cells. From start of first cleavage until cleavage is over. proliferating embryo Ce WBls:0000004
  The stage after an hermaphrodite animal is fully-developed and reaches maturity. adult hermaphrodite Ce WBls:0000057