Gene Networks Database


Strongylocentrotus purpuratus Genes in Development: Sea urchin retroposon family 1


SURF1-1


Function

SURF1-1 is a member of a family referred to as SURF1 (sea urchin retroposon family 1). This gene is expected to lie within the first intron of the single muscle actin gene and the family of these elements is present about 800 times in the genome (Nisson et al., 1988). SURF1-1 sequence appears to have been amplified and dispersed in the genome via RNA intermediates (Jagadeeswaran et al., 1981), and therefore referred to as retroposons (Rogers, 1985).

Protein

Retroposon

Subcellular location


Expression Pattern

The expression of SURF1-1 RNA is highest at 11 hours postfertilization (about 128 cells) and drops as development procedes. The expression is highest during the cleavage stages and decreases as development proceeds during which time the is increasing differentiation of a variety of cell types (Nisson et al., 1988).

mRNA level

Temporal accumulation

Method: hybridization to a 32^P-labelled RNA probe
Reference: Nisson et al., 1988

Stage
Egg
11 hour embryo (Cleavage)
Blastula
Gastrula
Plutei
Level
+
+
+
+
+


Sequences

GenBank

Regulatory Regions

Regions

Regulatory Connections

Upstream Genes

SURF1-1

Downstream Genes


Evolutionary Homologues

RNA polymerase III gene

Links

Urchin Web

Bibliography


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