Two Different Types of Intervening Sequences in the Glucoamylase Gene from Aspergillus Niger

Overview

Journal EMBO J

Specialties Biotechnology
Molecular Biology

Date 1984 Jul 1

PMID 6204865

Citations 38

Authors

E Boel

M T Hansen

I Hjort

I Hoegh

N P Fiil

Affiliations

Soon will be listed here.

Abstract

One single glucoamylase gene could be identified in the chromosomal DNA of Aspergillus niger by Southern blot analysis. This glucoamylase gene was isolated from a genomic library of A. niger DNA. The glucoamylase gene is situated on a 2.5-kb EcoRI-EcoRV fragment and contains five intervening sequences in the coding region. One 169-bp intron is involved in differential mRNA processing leading to the two different glucoamylase enzymes G1 and G2; the other four introns are all very small ranging from 55 to 75 bp in length. One intron has a significant homology to the coding region which immediately follows, and it contains the internal conserved sequence TACTAAC, which is also found in yeast chromosomal gene introns, and is thought to participate in mRNA splicing. Two transcription initiation sites and a typical eukaryotic promoter region with TATAAT and CAAT boxes are located upstream from the gene.

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