ID:GRP4_HUMAN DESCRIPTION: RecName: Full=RAS guanyl-releasing protein 4; FUNCTION: Functions as a cation- and diacylglycerol (DAG)- regulated nucleotide exchange factor activating Ras through the exchange of bound GDP for GTP. May function in mast cells differentiation. SUBCELLULAR LOCATION: Cytoplasm. Cell membrane. Note=Recruited to membranes upon activation by DAG. TISSUE SPECIFICITY: Expressed by mast cells and their progenitors (at protein level). Specifically expressed in mononuclear leukocytes. Highly expressed in myeloid cells compared to lymphoid cells. Also detected in heart, skeletal muscle, spleen, liver, placenta and lung. Not detected in brain. Isoform 1 is the major isoform in normal individuals. Isoform 2 is more significantly expressed in a patient with asthma. Isoform 3 is more significantly expressed in a patient with asthma and a mastocytosis patient. DEVELOPMENTAL STAGE: Expressed early during development. Detected in all fetal tissues tested. DOMAIN: The phorbol-ester/DAG-type zinc finger mediates the binding and the functional activation by DAG. SIMILARITY: Belongs to the RASGRP family. SIMILARITY: Contains 1 EF-hand domain. SIMILARITY: Contains 1 N-terminal Ras-GEF domain. SIMILARITY: Contains 1 phorbol-ester/DAG-type zinc finger. SIMILARITY: Contains 1 Ras-GEF domain.
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
ModBase Predicted Comparative 3D Structure on Q8TDF6
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Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.