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1.K.1.1.1
Baseplate structural protein complex (GP5 is a lysozyme showing limited similarity to ComA of Neisseria species (3.A.11.2.1)) plus Gp18 tail sheath protein of phage T4. Gp5 (575 aas), the baseplate hub subunit, contains (1) an N-terminal GP5_OB domain, (2) a central lysozyme domain, and (3) a C-terminal domain of ~200 aas with repeat units that resemble BigA (1.B.12.5.5; residues 400-600) and ComA (3.A.11.2.1; residues 400-600). Twenty proteins comprise the entire tail complex of T4. See Rossmann et al. 2004 and Leiman et al. 2010) for tabulation of the properties and evidence concerning the functions of these constituents. gp27 and gp29 may comprise the transmembrane channel (Hu et al. 2015). The tail complex of T4 resembles the type VI protein secretion systems (TC# 3.A.23) of enteric bacteria (Shneider et al. 2013).

Accession Number:P13341
Protein Name:Tail-tube assembly protein Gp54
Length:320
Molecular Weight:34977.00
Species:Enterobacteria phage T4 [10665]
Location1 / Topology2 / Orientation3: Virion1
Substrate deoxyribonucleic acid

Cross database links:

Structure:
5IV5     

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MYSLEEFNNQ AINADFQRNN MFSCVFATTP STKSSSLISS ISNFSYNNLG LNSDWLGLTQ 
61:	GDINQGITTL ITAGTQKLIR KSGVSKYLIG AMSQRTVQSL LGSFTVGTYL IDFFNMAYNS 
121:	SGLMIYSVKM PENRLSYETD WNYNSPNIRI TGRELDPLVI SFRMDSEACN YRAMQDWVNS 
181:	VQDPVTGLRA LPQDVEADIQ VNLHSRNGLP HTAVMFTMHS ISVSAPELSY DGDNQITTFD 
241:	VTFAYRVMQA GAVDRQRALE WLESAAINGI QSVLGNSGGV TGLSNSLSRL SRLGGTAGSI 
301:	SNINTMTGIV NSQSKILGAI