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. Author manuscript; available in PMC: 2009 Jul 5.
Published in final edited form as: Virology. 2008 May 13;376(2):330–338. doi: 10.1016/j.virol.2008.04.004

Table 1.

MS data and homologues for the 201φ2-1 proteins identified by HPLC-ESI-MS/MS.

Identification by MS1
gp M r(kDa) Unique peptides Total spectra Spectra/Mw % coverage Function, homologues, paralogues2
A. Proteins of established virion function according to Fokine et al. (2007)

303 77.5 22 355 4.6 44 major sheath protein, KZ429 (63% over 693); EL6 (21% over 707)
2005 82.4 22 696 8.4 38 major capsid protein, KZ120 (64% over 749); EL78 (20% over 325)
2765 251.8 23 34 0.1 10 cell-puncturing device, KZ181 (33% over 2387); KZ144 (45% over 187); EL183 (22% over 270)

B. RNA polymerase-related virion proteins

139 49.6 8 34 0.7 24 RNA polymerase, beta’ subunit, KZ80 (56% over 449); EL44 (23% over 447)
273/274 173.4 24 87 0.5 19 RNA polymerase, beta subunit, KZ178 (53% over 1548); EL186 (23% over 1142); EL187 (26% over 356)
275 62.7 8 27 0.4 15 RNA polymerase, beta subunit KZ180 (68% over 490); EL184 (32% over 491)

C. Other virion proteins

273 62.3 8 47 0.8 21 KZ26 (54% over 549), EL9 (29% over 540)
286 101.8 11 28 0.3 15 KZ27 (47% over 899); EL8 (26% over 898)
29 35.7 4 24 0.7 15 KZ28 (43% over 320); EL7 (21% over 181)
32 32.1 10 149 4.6 51 KZ30 (75% over 290); EL5 (20% over 217)
36 47.9 4 9 0.2 11 KZ32 (55% over 410); EL13 (27% over 373)
48 29.9 4 17 0.6 16 KZ34 (40% over 267)
49 12.3 5 43 3.5 53
73 31.2 3 10 0.3 11 KZ42 (61% over 274); EL14 (23% over 213)
81 14.7 4 4 0.3 25 KZ49 (44% over 135); EL20 (34% over 49)
98 41.9 5 19 0.5 17 KZ52 (51% over 362)
138 31.9 6 20 0.6 23 KZ79 (38% over 286)
145 49.0 9 34 0.7 26 ligase, KZ84 (34% over 434); EL52 (19% over 348)
146 15.9 7 63 4.0 74 KZ85 (33% over 145)
1487 47.5 9 38 0.8 (1.2) 23 KZ86 (24% over 378)
149 109 8 19 0.17 10 KZ87 (52% over 971); EL56 (25% over 981)
150 41 2 6 0.15 5 KZ88 (56% over 344); EL57 (28% over 334)
1515,7 44.4 13 107 2.4 (4.0) 29 KZ89 (53% over 406); EL58 (28% over 225)
152 34.4 12 121 3.5 43 KZ90 (47% over 294)
153 20.8 4 14 0.7 22 KZ91 (51% over 170)
154 49.1 8 28 0.6 22 KZ92 (34% over 356)
1557 65.6 17 121 1.8 (3.8) 31 KZ94 (26% over 305), paralogue family b
1567 43.2 9 70 1.6 (2.6) 25 KZ94 (30% over 410), paralogue family b
1577 53 9 62 1.2 (1.9) 27 KZ94 (22% over 380), paralogue family b
158 41.6 2 4 0.1 5 KZ96 (29% over 356)
1597 97.4 10 133 1.4 (4.0) 15 KZ97 (27% over 540)
162 54.8 3 13 0.2 6 KZ99 (53% over 465); EL69 (21% over 259)
164 51.9 2 3 0.06 5 KZ101 (42% over 457); EL71 (28% over 395)
1937 42.4 13 188 4.4 (7.0) 33
198 20.3 4 13 0.6 25 KZ119 (52% over 178)
211 15.9 2 6 0.4 17 KZ126 (33% over 142)
212 32.4 3 6 0.2 12 KZ127 (37% over 291)
213 84 5 11 0.1 8 KZ128 (49% over 725); EL104 (26% over 599)
214 102.3 8 21 0.2 15 KZ129 (51% over 880); EL103 (20% over 323)
215 48.9 4 18 0.4 18 KZ130 (53% over 439); EL112 (23% over 299)
216 79.7 9 43 0.5 17 KZ131 (38% over 782); EL113 (27% over 199) (paralogue family a)7
217 11.8 6 45 3.8 76 KZ132 (48% over 83); EL116 (27% over 77); (paralogue family a)7
218 50.7 6 14 0.3 14 KZ133 (37% over 464); EL115 (18% over 264)(paralogue family a)7
219 50.4 5 9 0.2 16 KZ134 (35% over 471); EL114 (23% over 247) (paralogue family a)7
220 48.5 3 10 0.2 9 KZ 135 (38% over 347); EL115 (20% over 268)(paralogue family a)7
224 32.5 7 34 1.1 26 KZ139 (66% over 292); EL106 (28% over 278)
226 16.3 4 9 0.6 30 KZ103 (26% over 97)
2276 14.6 3 11 0.7 21 KZ142 (31% over129)
228 23.9 6 42 1.8 30 KZ143 (46% over 181)
229 29.1 1 1 0.03 5 KZ144 (47% over 65)
230 155.8 50 606 3.9 59 KZ145 (51% over 222); KZ146 (27% over 760); EL156 (33% over 812)
233 25.4 5 18 0.7 26 KZ149 (62% over 221); EL175 (32% over 224)
2388 35.7 14 76 2.1 41 KZ153 (27% over 307)
243 50.8 15 110 2.2 44 KZ157 (53% over 442); EL169 (25% over 404)
245 23.2 1 1 0.04 6 KZ161 (42% over 203); EL168 (27% over 201)
246N7 66.4 3 14 (0.7) 17 KZ162 (24% over 330), paralogue family b
246C7 19 197 3.0 (4.4) 58
247 44.5 9 36 0.8 32 KZ163 (45% over 375), paralogue family b
261 40.8 12 25 0.6 42 KZ174 (38% over 380)
2686 31.9 5 36 1.1 18 KZ175 (55% over 268); EL192 (35% over 207)
269 27.1 1 5 0.2 5 KZ176 (63% over 240); EL191 (25% over 242)
2718 70.2 8 51 0.7 18 KZ177 (41% over 489)
277 59.0 3 5 0.07 4 KZ182 (64% over 668); EL182 (23% over 352)
280 21.1 2 18 0.9 14 KZ184 (59% over 120)
296 16.5 5 17 1.0 44 exonuclease; KZ199 (61% over 139)
298 70.1 4 10 0.1 7 KZ201 (27% over 635)
299 12.9 4 28 2.2 37 KZ202 (25% over 99)
300 81.1 7 17 0.2 12 helicase of the SNF2/RAD54 family; KZ203 (51% over 710); EL166 (33% over 500)
313 13.3 3 11 0.8 38 KZ244 (24% over 119)
382 12 2 24 2.0 37
439 31.7 5 17 0.5 25
440 32.1 6 36 1.1 32
441 72.4 12 44 0.6 34
442 35.5 6 19 0.5 20
452 26.5 2 10 0.4 9 KZ83 (25% over 243); EL155 (27% over 104), paralogue family c
455 87.6 16 62 0.7 21 KZ303 (28% over 406)
456 45 6 27 0.6 18 EL155 (26% over 191); KZ83 (26% over 183), paralogue family c
1

All proteins had a protein identity probability of 100%, as determined by Scaffold (Proteome Software), with the exception of gp164 (99%) and gp229 (96%). Results displayed were obtained from a combined data set of the GeLCMS analysis, with the exception of gp276 which was only detected in analysis of an individual gel band (see text).

2

Homologues were determined using Psi-Blast and BlastP (% identities over the homologous region are provided). The best matching φKZ and EL homologue for each 201φ2-1 protein is listed. Paralogue families are as follows: paralogue family a refers to a domain found in 201φ2-1 gp216, 217, 218, 219, 220. A homologous domain exists in φKZ gp131, 132, 133, 134 and 135 and EL gp113, 114 and 115; paralogue family b refers to a domain found in 201φ2-1 gp155, 156, 157, 246, 247. Homologous domains exist in φKZ gp93, 94, 95, 162 and 163; paralogue family c refers to a domain found in 201φ2-1 gps 456 and 452. Homologous domains exists in φKZ gp83 and EL gp155.

3

An N-terminal peptide lacking only the initiator methionine was identified using semi-tryptic analysis.

4

KZ refers to φKZ.

5

N-terminus is expected to be processed as the φKZ homologue is processed. Although no semi-tryptic fragments were found to define the mature ends, there is also a lack of peptide coverage in the N-terminal region that would be consistent with processing.

6

A mature N-terminus containing the initiator methionine was confirmed by semi-tryptic analysis.

7

Gel analysis indicated that the protein is processed consistent with a lack of MS sequence coverage in the N-terminal region of these sequences, except for gp246N which lacks MS coverage of the C terminal region. The exact positions of the processed ends are unknown. The normalized spectrum count in parentheses was calculated using the apparent molecular weight of the processed form (Fig. 1).

8

Semi-tryptic analysis indicated removal of 63 and 60 N-terminal residues from gp238 and gp271, respectively.