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Human ERMAP: an erythroid adhesion/receptor transmembrane protein
1Department of Pathology and Molecular Medicine, McMaster University, Faculty of Health Sciences, 1200 Main Street West, Hamilton, Ontario L8N 3Z5, Canada.
Blood Cells, Molecules & Diseases
|January 11, 2002
Summary
Researchers identified the human ERMAP gene, encoding a transmembrane protein crucial for red blood cell development. This protein, highly expressed in erythroid tissues, plays a role in cell adhesion and has structural similarities to known immune-related proteins.
Area of Science:
- Molecular Biology
- Genetics
- Immunology
Background:
- Erythroid transmembrane adhesion/receptor proteins are vital for red blood cell function.
- Understanding novel proteins in erythropoiesis can reveal new insights into hematological disorders.
Purpose of the Study:
- To characterize the human ERMAP gene and its encoded protein.
- To investigate the structure, expression, and localization of human ERMAP.
Main Methods:
- Human cDNA and gene sequencing.
- Homology analysis with murine ERMAP and other protein families.
- Expression analysis in erythroid tissues.
- Protein localization studies using cell imaging.
Main Results:
- Identified human ERMAP cDNA and gene, predicting a 475-amino acid protein.
- Human ERMAP shows high homology to murine ERMAP (73% identity).
- ERMAP is highly expressed in erythroid tissues, localizing to the plasma membrane and cytoplasmic bodies.
- Extracellular IgV fold and intracellular B30.2 domain show homology to butyrophilin, pyrin, and MID 1 families.
- The human ERMAP gene spans 19 kb on chromosome 1p34 and comprises 11 exons.
Conclusions:
- Human ERMAP is a novel erythroid transmembrane protein with structural similarities to known immune-related proteins.
- Its expression and localization suggest a role in cell adhesion and potentially immune interactions during erythropoiesis.