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1.W.6.1.1
The Bacillus phage phi29 (φ29) portal protein of 309 aas.  It forms the portal vertex of the capsid (Ibarra et al. 2000Fu and Prevelige 2009; Grimes et al. 2011). This portal plays roles in head assembly, genome packaging, neck/tail attachment, and genome ejection. The portal protein multimerizes as a single ring-shaped homododecamer arranged around a central channel (Guasch et al. 2002, Grimes et al. 2011). It binds to the 6 packaging RNA molecules (pRNA), forming a double-ring structure which in turn binds to the ATPase gp16 hexamer, forming the active DNA-translocating motor (Xiao et al. 2005, Simpson et al. 2000). This complex is essential for the specificity of packaging from the left DNA end.

Accession Number:P04332
Protein Name:Portal protein
Length:309
Molecular Weight:35878.00
Species:Bacillus phage phi29 [10756]
Number of TMSs:1
Location1 / Topology2 / Orientation3: Virion1
Substrate

Cross database links:

Structure:
1FOU   1H5W   1IJG   1JNB   6QX7   6QYJ   6QYM   6QZ9   6QZF      [...more]

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MARKRSNTYR SINEIQRQKR NRWFIHYLNY LQSLAYQLFE WENLPPTINP SFLEKSIHQF 
61:	GYVGFYKDPV ISYIACNGAL SGQRDVYNQA TVFRAASPVY QKEFKLYNYR DMKEEDMGVV 
121:	IYNNDMAFPT TPTLELFAAE LAELKEIISV NQNAQKTPVL IRANDNNQLS LKQVYNQYEG 
181:	NAPVIFAHEA LDSDSIEVFK TDAPYVVDKL NAQKNAVWNE MMTFLGIKNA NLEKKERMVT 
241:	DEVSSNDEQI ESSGTVFLKS REEACEKINE LYGLNVKVKF RYDIVEQMRR ELQQIENVSR 
301:	GTSDGETNE