HMM Summary Page: TIGR01540

Functionphage portal protein, PBSX family
Trusted Cutoff166.05
Domain Trusted Cutoff166.05
Noise Cutoff102.35
Domain Noise Cutoff102.35
Isology Typeequivalog
HMM Length320
Mainrole CategoryMobile and extrachromosomal element functions
Subrole CategoryProphage functions
AuthorHaft DH, Fouts DE
Entry DateJun 10 2002 11:19AM
Last ModifiedFeb 14 2011 3:27PM
CommentThis HMM represents one of several distantly related families of phage portal protein. This protein forms a hole, or portal, that enables DNA passage during packaging and ejection. It also forms the junction between the phage head (capsid) and the tail proteins. It functions as a dodecamer of a single polypeptide of average mol. wt. of 40-90 KDa. This family shows clear homology to TIGR01537. The alignment for this group was trimmed of poorly alignable N-terminal sequence of about 50 residues and of C-terminal regions present in some but not all members of up 180 residues.
ReferencesRN [1] RA Casjens S, Hendrix R RT Control Mechanisms in dsDNA Bacteriophage Assembly RL p. 15-91. In R. Calendar (ed.), The Bacteriophages. Plenum Press, New York and London, 1988
Genome PropertyGenProp0208: phage: major features (HMM)