TY - JOUR
T1 - The 3' and 5'-terminal sequences of influenza A, B and C virus RNA segments are highly conserved and show partial inverted complementarity
AU - Desselberger, Ulrich
AU - Racaniello, Vincent R.
AU - Zazra, James J.
AU - Palese, Peter
N1 - Funding Information:
The authors appreciate the excellent technical assistance of Ms. Marlene Lin. We thank H. Donis-Keller and O.C. Uhlenbeck for providing us with protocols of their procedures prior to publication, and W. Prensky for help in setting up the sequencing gel system. We also thank H. Donis-Keller for a gift of PhyM enzyme. We are grateful to J. Coffin and to T.J.R. Harris for helpful suggestions. One of us (U.D.) is a recipient of a Fulbright Fellowship, V.R.R. is supported by a N.I.H. training grant, and P.P. is a recipient of an I.T. Hirschl career research award. This work was supported by grant AI-11823 from the N.I.H., grant PCM78-07844 from the N.S.F. and grant VC-234 from the A.C.S.
PY - 1980/2
Y1 - 1980/2
N2 - The 3'- and 5'-terminal nucleotides of the genome segments of an influenza A, B, and C virus were identified by directly sequencing viral RNA using two different sequencing techniques. A high degree of conservation at the 3' ends as well as at the 5' ends was observed among the genome segments of each virus and among the segments of the three different virus types. A uridine-rich region was observed from positions 17 through 22 at the 5' end of each segment. Moreover, the conserved 3' and 5'-terminal sequences showed partial and inverted complementarity. This feature results in very similar sequences at the 3' ends of the plus and minus strand RNAs and may also enable single-strand RNAs of influenza virus to form "panhandle" structures. Inverted complementary repeats may play an important role in initiation of viral RNA replication.
AB - The 3'- and 5'-terminal nucleotides of the genome segments of an influenza A, B, and C virus were identified by directly sequencing viral RNA using two different sequencing techniques. A high degree of conservation at the 3' ends as well as at the 5' ends was observed among the genome segments of each virus and among the segments of the three different virus types. A uridine-rich region was observed from positions 17 through 22 at the 5' end of each segment. Moreover, the conserved 3' and 5'-terminal sequences showed partial and inverted complementarity. This feature results in very similar sequences at the 3' ends of the plus and minus strand RNAs and may also enable single-strand RNAs of influenza virus to form "panhandle" structures. Inverted complementary repeats may play an important role in initiation of viral RNA replication.
KW - RNA sequencing
KW - gene isolation
KW - genetic variation
KW - panhandle structures
UR - http://www.scopus.com/inward/record.url?scp=0018848920&partnerID=8YFLogxK
U2 - 10.1016/0378-1119(80)90007-4
DO - 10.1016/0378-1119(80)90007-4
M3 - Article
C2 - 7358274
AN - SCOPUS:0018848920
SN - 0378-1119
VL - 8
SP - 315
EP - 328
JO - Gene
JF - Gene
IS - 3
ER -