FUNCTION : INVOLVED IN THE PACKAGING OF PRE-MRNA INTO HNRNP PARTICLES, TRANSPORT OF POLY-A MRNA FROM THE NUCLEUS TO THE CYTOPLASM AND MAY MODULATE SPLICE SITE SELECTION. SUBCELLULAR LOCATION : NUCLEAR. SHUTTLES CONTINUOUSLY BETWEEN THE NUCLEUS AND THE CYTOPLASM ALONG WITH MRNA. COMPONENT OF RIBONUCLEOSOMES. ALTERNATIVE PRODUCTS : 2 isoforms; A1-A and A1-B (shown here); are produced by alternative splicing. Isoform A1-A is twenty times more abundant than A1-B. SIMILARITY : BELONGS TO THE A/B GROUP OF HNRNP, WHICH ARE BASIC AND GLY-RICH PROTEINS. SIMILARITY : CONTAINS 2 RNA RECOGNITION MOTIFS (RRM). |
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25-JAN-03
Last Update 13-Mar-03