t7 cds
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@ -36,6 +36,8 @@
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bind------------
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-----------init
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\end{verbatim}
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Transkrypcja rozpoczyna się przy oznaczonym gwiazdką guaninie \cite{rong1998}.
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\end{longenum}
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\vspace{0.5cm}
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@ -227,3 +227,17 @@
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pages = {6313--6317},
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year = {1982}
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}
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@article{rong1998,
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author = {Rong, M. and He, B. and McAllister, W.T. and Durbin, R.K.},
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title = {Promoter specificity determinants of T7 RNA polymerase},
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journal = {Proceedings of the National Academy of Sciences of the United States of America},
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year = {1998},
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volume = {95},
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number = {2},
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pages = {515--9},
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doi = {10.1073/pnas.95.2.515},
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pmid = {9435223},
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bibcode = {1998PNAS...95..515R}
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}
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@ -125,7 +125,7 @@ if refseq_id:
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else:
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print("Nie znaleziono odpowiedniego RefSeq ID.")
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#%%
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# Wyświetlanie etykiet (annotacji) dla CDS
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for feature in record.features:
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if feature.type == "CDS":
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@ -234,7 +234,75 @@ for feature in record.features:
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print()
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#%%
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# Znajdź i wyświetl sekwencję promotora T7
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sq = []
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for feature in record.features:
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if feature.type == "promoter" and "T7" in feature.qualifiers.get('note', [''])[0]:
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print("Promotor T7 znaleziony:")
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print(f"Type: {feature.type}")
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print(f"Location: {feature.location}")
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# Pobierz sekwencję promotora
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promoter_seq = record.seq[feature.location.start:feature.location.end]
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# Sprawdź orientację i odwróć/uzupełnij jeśli potrzebne
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if feature.location.strand == 1:
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strand_orientation = "(+)"
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sequence_with_ends = f"5'-{promoter_seq}-3'"
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elif feature.location.strand == -1:
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strand_orientation = "(-)"
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promoter_seq = promoter_seq.reverse_complement()
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sequence_with_ends = f"3'-{promoter_seq}-5'"
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else:
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strand_orientation = "(unknown strand)"
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sequence_with_ends = str(promoter_seq)
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#print(f"Strand: {strand_orientation}")
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print(f"Sequence: {sequence_with_ends}")
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print()
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# Znajdź orientację CDS w pliku GenBank
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cds_orientation = None
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for feature in record.features:
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if feature.type == "CDS":
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cds_orientation = feature.location.strand
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break # Zakładamy, że interesuje nas pierwszy znaleziony CDS
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# Znajdź i wyświetl sekwencję promotora T7 z oznaczeniem na podstawie orientacji CDS
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for feature in record.features:
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if feature.type == "promoter" and "T7" in feature.qualifiers.get('note', [''])[0]:
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print("--")
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print("Promotor T7 znaleziony:")
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print(f"Type: {feature.type}")
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# Pobierz lokalizację
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start = feature.location.start
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end = feature.location.end
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# Pobierz sekwencję promotora
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promoter_seq = record.seq[start:end]
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# Oblicz sekwencję komplementarną
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complementary_seq = promoter_seq.complement()
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# Przygotuj format wyjścia na podstawie orientacji CDS
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if cds_orientation == 1:
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# CDS na nici dodatniej
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positive_strand_output = f" [{start}:{end}](+) 5'-{promoter_seq}-3'"
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negative_strand_output = f" [{start}:{end}](-) 3'-{complementary_seq}-5'"
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elif cds_orientation == -1:
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# CDS na nici ujemnej
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positive_strand_output = f" [{start}:{end}](+) 5'-{promoter_seq}-3'"
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negative_strand_output = f"* [{start}:{end}](-) 3'-{complementary_seq}-5'"
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else:
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# Orientacja CDS nieokreślona
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positive_strand_output = f" [{start}:{end}](unknown) 5'-{promoter_seq}-3'"
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negative_strand_output = f" [{start}:{end}](unknown) 3'-{complementary_seq}-5'"
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# Wyświetl wyniki
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print(f"(+): {positive_strand_output}")
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print(f"(-): {negative_strand_output}")
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print()
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#%%
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# Znajdź i wyświetl sekwencję terminatora T7
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print(f"(+) Sequence: {terminator_seq}")
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print()
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#%%
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#%%
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t=record[25:73].seq
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