CpeT family


CpeT from the Prochlorococcus marinus MED4 cyanophage P-HM1 was biochemically characterized and its structure resolved at 1.8-Å (Protein Data Bank ID: 5HI8). It attaches a PEB at Cys-155 of beta-PEI (Gasper et al. 2017) and perhaps at the corresponding position in beta-PEII of marine Synechococcus cyanobacteria. CpeT was also characterized in the red alga Gracilariopsis lemaneiformis as a PEB:Cys-158 beta-phycoerythrin lyase (Cao et al. 2019).


Phyre2 found the following protein fold for this family:



  • Cao et al., 2019. Molecular cloning of the cpeT gene encoding a bilin lyase responsible for attachment of phycoerythrobilin to Cys-158 on the β-subunit of phycoerythrin in Gracilariopsis lemaneiformis J Appl Phycol, 1-10.
  • Gasper et al., 2017. Distinct features of cyanophage-encoded T-type phycobiliprotein lyase Phi-CpeT: The role of auxilliary genes J Biol Chem, 292, 3089-3098.

Gene Locus tag Genbank Species Strain PBP in rods Pigment type Remark Length Last change
CpeT family sync_0509 YP_729736.1 Synechococcus sp. CC9311 PC+PEI+PEII 3dA/CA4-A 208 09-26-2011
CpeT family Syncc9605_0440 YP_380771.1 Synechococcus sp. CC9605 PC+PEI+PEII 3c 204 09-26-2011
CpeT family SH8109_0065 ZP_05789950.1 Synechococcus sp. WH8109 PC+PEI+PEII 3bB 204 09-26-2011
CpeT family SYNW2003 NP_898094.1 Synechococcus sp. WH8102 PC+PEI+PEII 3c 204 09-26-2011
CpeT family Syncc9902_1887 YP_377888.1 Synechococcus sp. CC9902 PC+PEI+PEII 3dA/CA4-A 204 09-26-2011
CpeT family BL107_08986 ZP_01469900.1 Synechococcus sp. BL107 PC+PEI+PEII 3dA/CA4-A 204 09-26-2011
CpeT family SynWH7803_0498 YP_001224221.1 Synechococcus sp. WH7803 PC+PEI+PEII 3a 204 09-26-2011
CpeT family WH7805_06676 ZP_01123335.1 Synechococcus sp. WH7805 PC+PEI 2 203 09-26-2011
CpeT family RS9916_40266 ZP_01473096.1 Synechococcus sp. RS9916 PC+PEI+PEII 3dA/CA4-A 203 07-02-2013
CpeT family SynRCC307_2042 YP_001228298.1 Synechococcus sp. RCC307 PC+PEI+PEII 3eA 208 09-26-2011
CpeT family SCB02_010100004288 ZP_07970127.1 Synechococcus sp. CB0205 PC+PEI 2 203 11-04-2011
CpeT family S7335_3658 ZP_05037220.1 Synechococcus sp. PCC7335 PC+PEI CA3 213 09-26-2011
CpeT family Syn8016DRAFT_2760 ZP_08957413.1 Synechococcus sp. WH8016 PC+PEI+PEII 3aA 201 11-04-2011
CpeT family NATL1_03901 YP_001014219.1 Prochlorococcus marinus NATL1A PEIII high b/a 199 09-26-2011
CpeT family PMN2A_1676 YP_292867.1 Prochlorococcus marinus NATL2A PEIII high b/a 199 09-26-2011
CpeT family Pro0342 NP_874736.1 Prochlorococcus marinus SS120 (CCMP1375) PEIII high b/a 195 09-26-2011
CpeT family P9211_03371 YP_001550222.1 Prochlorococcus marinus MIT9211 PEIII High b/a 192 09-26-2011
CpeT family P9303_22311 YP_001018231.1 Prochlorococcus sp. MIT9303 PEIII high b/a 204 09-26-2011
CpeT family PMT1678 NP_895505.1 Prochlorococcus sp. MIT9313 PEIII high b/a 204 09-26-2011
CpeT family CwatDRAFT_0664 ZP_00518424.1 Crocosphaera watsonii WH8501 PC+PEI Several possible starts. This second (complete) cpeT copy is only distantly related to the other (partial) cpeT copy. 215 09-25-2012
CpeT family PCC7424_5722 YP_002381017.1 Cyanothece sp. PCC7424 PC+PEI 2 204 09-26-2011
CpeT family PCC8801_4526 YP_002364803.1 Cyanothece sp. PCC8801 PC+PEI 2 200 09-26-2011
CpeT family Cyan7822_4032 YP_003889232.1 Cyanothece sp. PCC7822 PC+PEI 2 206 09-26-2011
CpeT family gi|145967348|gb|ABP99030.1| ABP99030.1 Fremyella diplosiphon (Tolypothrix sp. / Calothrix sp.) Fd33 (UTEX481/PCC7601) PC+PEI CA3 207 09-26-2011
CpeT family gvip163 NP_924139.1 Gloeobacter violaceus PCC7421 PC+PEI 2 203 11-24-2011
CpeT family GL6909_3549 Gloeothece sp. PCC6909/1 PC+PEI 2 201 06-01-2011
CpeT family Npun_F0738 YP_001864433.1 Nostoc punctiforme ATCC29133 (PCC73102) PC+PEI 2 209 09-26-2011
CpeT family Tery_0979 YP_720833.1 Trichodesmium erythraeum IMS101 PC+PEI 209 09-26-2011
CpeT family LYNGBM3L_16720 ZP_08428243.1 Lyngbya majuscula 3L PC+PEI 2 203 10-19-2011
CpeT family CwatDRAFT_5720 ZP_00514725.1 Crocosphaera watsonii WH8501 PC+PEI Similar to CpeT, but with a 51 aa deletion in the middle. N- and C-term closely related to WH0003 cpeT sequence. 149 09-26-2012
CpeT family CWATWH0003_1104 EHJ14215.1 Crocosphaera watsonii WH0003 PC+PEI 200 02-22-2012
CpeT family MICAI_380006 ZP_10229443.1 Microcystis sp. T1-4 PC+PEI 2 197 08-22-2012
CpeT family Ple7327_0105 YP_007079148.1 Pleurocapsa sp. PCC7327 PC+PEI 194 04-23-2013
CpeT family Mic7113_4757 YP_007123836.1 Microcoleus sp. PCC7113 PC+PEI 2 206 04-23-2013
CpeT family Osc7112_1029 YP_007114003.1 Oscillatoria nigro-viridis PCC7112 PC+PEI 2 200 04-23-2013
CpeT family Xen7305DRAFT_00019030 ZP_21056251.1 Xenococcus sp. PCC7305 PC+PEI 209 04-23-2013
CpeT family Pse7367_3899 YP_007083554.1 Pseudanabaena sp. PCC7367 PC+PEI 212 04-23-2013
CpeT family GLO73106DRAFT_00012570 ZP_21051593.1 Gloeocapsa sp. PCC73106 PC+PEI 197 04-23-2013
CpeT family ZP_18907659 ZP_18907659.1 Leptolyngbya sp. PCC7375 PC+PEI 2 203 04-23-2013
CpeT family Lepto7376_0476 YP_007069742.1 Leptolyngbya sp. PCC7376 PC+PEI 208 04-24-2013
CpeT family Sta7437_0961 YP_007131509.1 Stanieria cyanosphaera PCC7437 PC+PEI 208 04-29-2013
CpeT family Cha6605_4068 YP_007098551.1 Chamaesiphon minutus PCC6605 PC+PEI 201 04-29-2013
CpeT family Cal6303_1333 YP_007136365.1 Calothrix sp. PCC6303 PC+PEI 2 209 04-29-2013
CpeT family Osc10802DRAFT_5369 Oscillatoria sp. PCC10802 PC+PEI 200 06-12-2013

Model strain Model strains, Marine strains

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