Details
| Original language | English |
|---|---|
| Pages (from-to) | 648-657 |
| Number of pages | 10 |
| Journal | Molecular and General Genetics |
| Volume | 252 |
| Issue number | 6 |
| Publication status | Published - 21 Nov 1996 |
| Externally published | Yes |
Abstract
The broad bean late nodulins, Nvf-28/32, are composed of two types of repetitively occurring sequence modules flanked by unique N- and C-terminal modules. Six isoforms of these nodulins were characterized by a specific modular structure resulting from a different individual order of repetitive sequence modules. A detailed analysis of genomic PCR fragments revealed that the repetitive modules and the N-terminal unique module exactly corresponded to exons, whereas the C-terminal module was specified by two exons. Since those exons encoding the repetitive modules missing in specific Nvf-28/32 isoforms were consistently present within genomic sequences, a post-transcriptional generation of VfNOD28/32 transcripts specifying six Nvf-28/32 nodulins was concluded. Using tissue-print hybridizations, these transcripts were localized in the interzone II-III and the nitrogen-fixing zone III of root nodules. From this and from cDNA-cDNA hybridizations demonstrating a comparable timing of expression of VfNOD28/32 and of leghemoglobin transcripts in root nodules, a function of the modular nodulins Nvf-28/32 in late developmental stages of broad bean nodules was inferred.
Keywords
- Alternative splicing, Late nodulins, Tissue-print hybridization
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Genetics
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In: Molecular and General Genetics, Vol. 252, No. 6, 21.11.1996, p. 648-657.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The modular nodulins Nvf 28/32 of broad bean (Vicia faba L.)
T2 - Alternative exon combinations account far different modular structures
AU - Küster, Helge
AU - Frühling, Martin
AU - Pühler, Alfred
AU - Perlick, Andreas M.
PY - 1996/11/21
Y1 - 1996/11/21
N2 - The broad bean late nodulins, Nvf-28/32, are composed of two types of repetitively occurring sequence modules flanked by unique N- and C-terminal modules. Six isoforms of these nodulins were characterized by a specific modular structure resulting from a different individual order of repetitive sequence modules. A detailed analysis of genomic PCR fragments revealed that the repetitive modules and the N-terminal unique module exactly corresponded to exons, whereas the C-terminal module was specified by two exons. Since those exons encoding the repetitive modules missing in specific Nvf-28/32 isoforms were consistently present within genomic sequences, a post-transcriptional generation of VfNOD28/32 transcripts specifying six Nvf-28/32 nodulins was concluded. Using tissue-print hybridizations, these transcripts were localized in the interzone II-III and the nitrogen-fixing zone III of root nodules. From this and from cDNA-cDNA hybridizations demonstrating a comparable timing of expression of VfNOD28/32 and of leghemoglobin transcripts in root nodules, a function of the modular nodulins Nvf-28/32 in late developmental stages of broad bean nodules was inferred.
AB - The broad bean late nodulins, Nvf-28/32, are composed of two types of repetitively occurring sequence modules flanked by unique N- and C-terminal modules. Six isoforms of these nodulins were characterized by a specific modular structure resulting from a different individual order of repetitive sequence modules. A detailed analysis of genomic PCR fragments revealed that the repetitive modules and the N-terminal unique module exactly corresponded to exons, whereas the C-terminal module was specified by two exons. Since those exons encoding the repetitive modules missing in specific Nvf-28/32 isoforms were consistently present within genomic sequences, a post-transcriptional generation of VfNOD28/32 transcripts specifying six Nvf-28/32 nodulins was concluded. Using tissue-print hybridizations, these transcripts were localized in the interzone II-III and the nitrogen-fixing zone III of root nodules. From this and from cDNA-cDNA hybridizations demonstrating a comparable timing of expression of VfNOD28/32 and of leghemoglobin transcripts in root nodules, a function of the modular nodulins Nvf-28/32 in late developmental stages of broad bean nodules was inferred.
KW - Alternative splicing
KW - Late nodulins
KW - Tissue-print hybridization
UR - http://www.scopus.com/inward/record.url?scp=0029910975&partnerID=8YFLogxK
U2 - 10.1007/s004380050273
DO - 10.1007/s004380050273
M3 - Article
C2 - 8917307
AN - SCOPUS:0029910975
VL - 252
SP - 648
EP - 657
JO - Molecular and General Genetics
JF - Molecular and General Genetics
SN - 0026-8925
IS - 6
ER -