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Euglena chloroplast protein polyprotein precursors

Candidate: concept label1 source documents3 linked claims
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Aliases

Expression of Polyproteins in Euglena, polyprotein precursors

Extracted Explainers

What the tool is doing

The paper describes LHC-binding proteins and the small subunit of RuBisCO in Euglena as being translated as polyprotein precursors from high molecular weight mRNAs.

Source 1DOI

Resources required

The abstract only supports that this expression mode occurs in Euglena cells for specific chloroplast proteins.

Source 1DOI

What problem it solves

The abstract does not state a problem-solving rationale, only that this is an unusual biological expression strategy.

Source 1DOI

What it does not solve

The abstract does not present this as a general engineering solution or define where it fails.

Source 1DOI

Alternatives

The abstract contrasts Euglena with higher plants and algae, where the structure and expression of these genes are said to be completely different.

Source 1DOI

Evidence Snippets

In this organism, these two important chloroplast proteins are translated as polyprotein precursors from unusual high molecular weight mRNAs.
Evidence 1Source 1DOIprovenance

Supporting Sources

Linked Claims

Claim 1expression strategysupports1993Source 1DOI

In Euglena, genes encoding LHC-binding proteins and the small subunit of RuBisCO are expressed as polyprotein precursors translated from unusual high molecular weight mRNAs.

Quoted textsource-backed
In this organism, these two important chloroplast proteins are translated as polyprotein precursors from unusual high molecular weight mRNAs.
Claim 2regulationsupports1993Source 1DOI

Light controls expression of these Euglena genes at a post-transcriptional level, either by mobilization onto polysomes or at the translational step depending on greening conditions.

Quoted textsource-backed
Light controls the gene expression at a post-transcriptional level, either by mobilization onto the polysomes or at the translational step, depending on the greening conditions.
Claim 3structural organizationsupports1993Source 1DOI

Euglena SSU polyproteins contain 8 consecutive peptides and LHC polyproteins contain 6 to 12 consecutive peptides separated by a decapeptide motif.

Quoted textsource-backed
The structure of the polyproteins consists in consecutive peptides (8 for SSU and 6 to 12 for LHC proteins) separated by a decapeptide motif.