WormMine: AnatomyTerm WBbt:0004824

• Definition: Ventral cord motor neurons, reciprocal inhibitors, chnage synaptic pattern during postembryonic development
• Name: DD6
• Primary Identifier: WBbt:0004824
• Synonym: lineage name: ABprppapppp

1 Children

Definition	Name	Synonym	Primary Identifier
nucleus of pedigree ABprppapppp	ABprppapppp nucleus		WBbt:0001969

2 Expression Clusters

Regulated By Treatment	Description	Algorithm	Primary Identifier
	Top 300 transcripts enriched in DD1, DD2, DD3, DD4, DD5, DD6 according to single cell RNAseq.	Top 300 enriched transcripts were determined by log2.ratio of the tpm in the cell type vs the tpm in the other cells * the log2 of the cell.type tpm.	WBPaper00061340:DD
	Transcripts enriched in VD_DD according to single cell RNAseq.	Genes that pass the Bonferroni threshold for multiple comparisons (q < 0.05) are significantly enriched.	WBPaper00061651:VD_DD_enriched

54 Expression Patterns

• Primary Identifier: Expr15619

• Primary Identifier: Expr15558

• Primary Identifier: Expr9325
• Pattern: Synaptogyrin is expressed in all 26 GABAergic neurons including also RMER and most though not all other neurons. Synaptogyrin is absent in amphids and phasmids and can be detected in non-neuronal glial-like sheath cells in adult worms. The cephalic neurons CEPDR/L and CEPVR/L and amphid-associated sheath cells CEPshDR/L, CEPshVR/L were tentatively positive. Several other neurons that could be tentatively identified in the anterior part are MI, M4, I4, AVL, AIY, RIS, I5, M3R/L, and in the posterior part DVA, AS11, ALNR/L, DVC, DVB, PQR, DA9 (characteristic axonal process denoted by arrowhead), VD13, DD6, VD12. Of these, AVL, RIS, VD13, DD6 and VD12 are GABAergic based on the colocalization with the unc-47p::GFP reporter. In addition, IL neurons were tentatively identified in the anterior (IL*). Synaptogyrin reporter constructs are also expressed in developing neurons. The expression of sng-1p::YFP is closely associated with the development of the nervous system being absent in the gastrula stage with first fluorescence in neuronal precursor cells and newly-formed neurons in the anterior part during the 1.5-fold stage. In addition, it is also detected transiently in cells in the posterior body at the 1.25-fold and 1.5-fold stage.

• Primary Identifier: Expr15567

• Primary Identifier: Expr15571

• Primary Identifier: Expr15572

• Primary Identifier: Expr15573

• Primary Identifier: Expr15579

• Primary Identifier: Expr15586

• Primary Identifier: Expr15651

• Primary Identifier: Expr15652

• Primary Identifier: Expr15589

• Primary Identifier: Expr13158

• Primary Identifier: Expr15591

• Primary Identifier: Expr15598

• Primary Identifier: Expr15604

• Primary Identifier: Expr15608

• Primary Identifier: Expr15611

• Primary Identifier: Expr3875
• Remark: The timing expression pattern of coq-8 gene reported herein correlates with the overall Q content in C. elegans. Higher expression of coq-8 gene, and presumably Q biosynthesis activity, correspond with those tissues with particularly active bioenergetics in different development stages during life cycle. Thus coq-8 expression pattern may directly or indirectly reflect bioenergetics and cellular activity in vivo.
• Pattern: As adult animals progressed towards the post-fertile period, COQ-8::GFP expression became restricted to nervous system, whilst in other tissues, including muscles, progressively diminished until it completely disappeared. During the adult stage stained neurons could be individually identified. These included at least the ASIL, ASIR, PHAL, PHAR, PVDR and PVDL sensory neurons. The interneurons AVKL, AVKR, PVT, PVQL, PVQR, and motoneurons AS1 to AS8, DA1 to DA9, DD1 to DD6, and VC1 to VC6, were also stained. COQ-8 expression in hypodermis was not evident until worms reached the L2 stage, however not all hypodermal cells showed similar expression levels. Lateral hypodermal syncytium appeared heavily stained whereas seam cells, that form a protruding hypodermal ridge termed alae, did not show significant fluorescence. Neuronal cells stained in L1 remained stained during L2 stage. COQ-8 expression pattern changed in L4 larvae and young adult stages of very active and fertile young individuals. Hypodermis fluorescence decreased abruptly and GFP signal appeared restricted to muscles and nervous system. It worth noting that hypodermal COQ-8::GFP expression was readily observed during moulting period but decreases abruptly in young adults, that no further moults, allowing the detection of COQ-8::GFP fluorescence in smaller cells as coelomocytes, which were not readily visible in earlier larval stages. Coelomocytes are defensive phagocytes that produce reactive oxygen species (ROS) in worms and other invertebrates and a high Q content would be needed to prevent oxidative damage derived from this particular oxygen metabolism. During egg development fluorescence was readily detectable in early pre-morphogenetic stages about 4 to 5 h post-fertilization, becoming higher in both intensity and number of fluorescent cells during later embryogenesis. 4D microscopy revealed some spatial and temporal variability in the initial expression of COQ-8::GFP from embryo to embryo. The beginning of the COQ-8::GFP expression was detected between the 8th and the 10th embryonic mitosis and was triggered by a group of several blastomeres in all the analyzed embryos. These blastomers are committed to differentiate into specific tissues with high energetic requirements, such as neurons and muscles, but also hypodermis and coelomocytes. These tissues also showed fluorescence during later life stages. Fluorescence reached its maximum intensity in L3 stage of development, supporting a genetic basis to previous observations that showed highest Q content in L2 ~ L4 stages. Longitudinal nervous ventral and dorsal cords showed high fluorescence and some muscular innervations were also stained at this stage. Expression of COQ-8::GFP was clearly evident in hypodermis, neurons and cords, and muscle cells. This expression pattern cannot exclude other tissues showing much weaker fluorescence that may not be readily observed. The expression in muscle and neuronal cells was detected during larval development as early as in the first larval stage (L1). At this stage, longitudinal muscles quadrants were GFP-stained tail and pharyngeal ring neural centres displayed significantly higher COQ-8 expression levels than other tissues. The nervous system of L1 wild type larvae is not entirely developed and contains fewer connections between neurons than in older animals, as it is observed by the GFP staining.

• Primary Identifier: Expr1734
• Remark: Lines expressing GFP::CED-10 were generated by injection of ced-10::gfp::ced-10 with an unc-76-rescuing construct, P76-16B, both at 75 ng/l, into unc-76(e911) animals.
• Pattern: Cell type identifications were confirmed by the examination of a nuclear-localized GFP expressed from the ced-10 promoter. GFP::CED-10 was expressed broadly, perhaps in all cells, including neurons (CANs, VDs and DDs), engulfing cell types (including the hypodermis, intestine and pharynx) and the distal tip cells. Expression was first seen in early embryogenesis and continued throughout adulthood in all cell types.
• Subcellular Localization: Strong fluorescence was observed within the axons of the nerve ring. The GFP::CED-10 fusion protein accumulated at the plasma membrane.

• Primary Identifier: Expr7808
• Remark: Picture: Figure 7.
• Pattern: A highly reproducible pattern of DKF-1 expression was observed as animals matured from embryo to adult. Intense fluorescence signals corresponding to DKF-1GFP revealed robust kinase accumulation in both (a) a region bounded by the anterior and posterior bulbs of the pharynx and (b) a tail area that contains lumbar, dorsorectal and pre-anal ganglia. Specifically, DKF-1 is differentially enriched in a cluster of cells that are immediately adjacent to the posterior pharyngeal bulb. Strong signals also emanate from cells positioned along the lateral surface of this bulb in animals carrying the dkf-1P::DKF-1GFP transgene. At the anterior pharyngeal bulb, DKF-1 accumulates selectively in bodies and in very thin processes (dendrites and axons) of two neurons. Nearly all cells expressing DKF-1 appear to be neurons. Two fluorescent cells with similar sizes and locations (at the anterior edge of the isthmusposterior bulb) may be M2 motor neurons. The location of the more posterior fluorescent neuron approximates the position of the cell body of an NSM neuron. DKF-1 also accumulates in a cell resembling I1. Other candidate DKF-1-enriched cells in the pharyngeal region include: the AWB, ADL, and ADF chemosensory neurons; and AVB and AIA interneurons.n C. elegans tail, DKF-1GFP expression is differentially elevated in neurons located within the dense neuropile of several tail ganglia. The pattern of fluorescence reveals that cell bodies and/or processes of phasmid neurons (PHA, PHB, and PHC), interneurons (PVC, DVA, DVB, PVQ, PVT) and motor neurons (VD13, DD6, VA12) are candidate sites for accumulation of DKF-1 protein.
• Subcellular Localization: Expressed in neuronal cell bodies and/or processes.

• Primary Identifier: Expr15344

• Primary Identifier: Expr15570

• Primary Identifier: Expr15644

• Primary Identifier: Expr15648

• Primary Identifier: Expr11224
• Remark: At 335 minutes post fertilization.
• Pattern: efn-2 expression showed widespread left-right asymmetry inembryos, both in amphid neurons and in other cells.

• Primary Identifier: Expr15623

• Primary Identifier: Expr15641

• Primary Identifier: Expr15633

• Primary Identifier: Expr15335

11 Life Stages

Remark	Definition	Other Name	Public Name	Primary Identifier
	The whole period of embryogenesis in the nematode Caenorhabditis elegans, from the formation of an egg until hatching.		embryo Ce	WBls:0000003
	The C. elegans life stage spanning 620-800min(hatch) 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. A stage after elongation is over. The last stage of embryogenesis. Also called pre-hatched embryo, late embryo or morphogenetic embryo.		fully-elongated embryo Ce	WBls:0000021
	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 290-350min after first cleavage at 20 Centigrade. Proliferate from 421 cells to 560 cells. The stage when embryo just finished gastrulation and is enclosing.		enclosing embryo Ce	WBls:0000013
	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 C. elegans life stage spanning 520-620min 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 shape of embryo is elongated and tripple fold. A stage between 2-fold embryo and fully-elongated embryo. Also called pretzel embryo or pretzel stage.		3-fold embryo Ce	WBls:0000020
	The C. elegans life stage spanning 420-460min 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 shape of embryo is elongated and fold back 50%. A stage between comma embryo and 2-fold embryo.		1.5-fold embryo Ce	WBls:0000018
	The C. elegans life stage spanning 390-420min 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 shape of embryo looks like a comma. A stage between bean embryo and 1.5-fold embryo.		comma embryo Ce	WBls:0000017
	The C. elegans life stage spanning 460-520min 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 shape of embryo is elongated and double fold. A stage between 1.5-fold embryo and 3-fold embryo.		2-fold embryo Ce	WBls:0000019
	The C. elegans life stage spanning 350-390min 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. Emrbyo elongation started but have not formed comma shape yet. The shape of embryo looks like a lima bean. A stage right before comma embryo. Also called lima embryo or lima bean stage.		bean embryo Ce	WBls:0000016
	The C. elegans life stage spanning 210-350min after first cleavage at 20 Centigrade. Proliferate from 421 cells to 560 cells. The stage before the fast cleavage of cells finishes.		late cleavage stage embryo Ce	WBls:0000014

3 Parents

Definition	Name	Synonym	Primary Identifier
Neuron class of six motoneurons, with cell bodies in the ventral cord, which innervate dorsal muscles. Each cell has a short, posteriorly directed and a longer, anteriorly directed process emanating from its cell body. The anterior process has a branch, which leaves the ventral cord as a commissure and runs round to the dorsal cord.	DD neuron		WBbt:0005270
neuron with cell body in the preanal ganglion.	preanal ganglion neuron	preanal ganglion neurons	WBbt:0005447
embryonic cell	ABprppappp		WBbt:0006388