What is the Difference Between Regulatory and Repressor Protein?
🆚 Go to Comparative Table 🆚The main difference between regulatory and repressor proteins lies in their function in gene expression. Both proteins are involved in the regulation of gene expression, but they have opposite effects:
- Regulatory Protein: These proteins bind with DNA and aid in the regulation of gene expression by either inhibiting or inducing it. They can be further classified into two types:
- Activator Proteins: These proteins turn genes on when they bind DNA, thereby promoting gene expression.
- Repressor Proteins: These proteins turn genes off when they bind DNA, thereby inhibiting gene expression.
- Repressor Protein: Repressor proteins are a specific type of regulatory protein that binds to RNA or DNA and blocks gene expression. They often bind to the associated promoter or silencer, preventing the binding of DNA-dependent RNA polymerase to the promoter and inhibiting the transcription of genes. Repressor proteins can either reduce or completely block gene expression.
In summary, regulatory proteins can either promote or inhibit gene expression, while repressor proteins specifically inhibit gene expression.
On this pageWhat is the Difference Between Regulatory and Repressor Protein? Comparative Table: Regulatory vs Repressor Protein
Comparative Table: Regulatory vs Repressor Protein
Here is a table comparing the differences between regulatory and repressor proteins:
| Feature | Regulatory Proteins | Repressor Proteins |
|---|---|---|
| Function | Can promote or inhibit the transcription of genes | Inhibit the expression of one or more genes |
| Binding | Binds with specific regions of genes | Binds with DNA or RNA |
| Examples | Activators and some repressor proteins | Methionine repressor MetJ, lactose repressor protein (LacI) |
| Gene Regulation | Gene expression can be regulated in different ways | DNA binding repressor proteins prevent the binding of RNA polymerase to the promoter of the gene, and RNA binding repressor proteins block the translation of mRNA into proteins |
| Similarities | Both regulate gene expression and bind with specific regions of genes | Some regulatory proteins are repressor proteins |
Regulatory proteins and gene regulation differ between prokaryotes and eukaryotes. In prokaryotes, most regulatory proteins are specific to one gene. Repressor proteins often bind with the promoter region or associated silencers.
Read more:
- Repressor vs Corepressor
- Activator Promoter vs Repressor
- Structural vs Regulatory Genes
- Inducible vs Repressible Operon
- Gene Expression vs Gene Regulation
- Oncogene vs Tumor Suppressor Gene
- Positive vs Negative Gene Regulation
- Operon vs Regulon
- Recombinant DNA vs Recombinant Protein
- Repression vs Suppression
- Feedback Inhibition vs Feedback Repression
- Histone vs Nonhistone Proteins
- Oncogenes vs Oncoprotein
- Gene vs Protein
- Peptide vs Protein
- Oppression vs Repression
- Protein Synthesis vs DNA Replication
- Transcriptional vs Posttranscriptional Gene Silencing
- CRISPR vs Restriction Enzymes