cpn60 Plasmid Clone Collection

cpn60 clone panel. Plasmid DNA containing the cloned cpn60 UT sequence from each of the samples described below is available to the phytoplasma research community upon request (www.addgene.org). In all cases except O2L and SF1, amplicon was generated using the phytoplasma cpn60 UT primers described on the “primer sets” tab.

Clone Name

cpn60 UT Classification

cpn60 UT GenBank Accession

cpnDB ID1

16S Classification

16S GenBank Accession

Phytoplasma Species

Host

Country of Origin

Literature Reference

Plasmid Accession No.2

O2L3

I-IA

KJ939998

b27096

16SrI-A

MH279536

‘Ca. P. asteris’

Onion

Canada
(Saskatchewan)

(1)

123000

SF14

I-IB

KJ940013

b27105

16SrI-B

MH279534

‘Ca. P. asteris’

Flax

Canada
(Saskatchewan)

(1)

123001

BbSP

I-I(E/AI)AI

KU523402

b27454

16SrI-E/AI5

MH279523 (E); MH279522 (AI)

‘Ca. P. asteris’

Blueberry

Canada
(Nova Scotia)

(2)

123002

CVB

I-IF

KJ939995

b27145

16SrI-F

MH279545

‘Ca. P. asteris’

Periwinkle

Italy

(1)

123003

AY-Col

I-IC

KJ939994

b27144

16SrI-R

MH279535

‘Ca. P. asteris’

Periwinkle

Italy

(1)

123004

R018

II-IC

MH279495

b31187

16SrII-C

MH266698

‘Ca. P. aurantifolia’

Lime

Iran

(3)

123005

TagTall

IV-IC

MH922781

b32834

16SrIV-C

MH922778

‘Ca. P. cocostanzaniae’

Coconut

Tanzania

(3)

123007

Sab4

IV-IE

MH922782

b32835

16SrIV-D

MH922779

‘Ca. P. palmae’

Palm

USA
(Florida)

(3)

123008

Palm A-DR

IV-IE

MH922783

b32836

16SrIV-E

MH922780

‘Ca. P. palmae’

Coconut

Dominican Republic

(3)

123009

FD

V-IC

KJ939992

b27153

16SrV

NA6

‘Ca. P. ulmi’

Grape

France

(1)

123010

PGY

V-IC

KJ939991

b27154

16SrV-C

MH279539

‘Ca. P. ulmi’

Periwinkle

Germany

(1)

123011

RS

V-IC

KJ939990

b27155

16SrV-C

MH279544

‘Ca. P. rubi’

Periwinkle

Germany

(1)

123012

Cr

IX-IH

KJ939989

b27158

16SrIX-A

NA7

‘Ca. P. phoenicium’

Periwinkle

Cuba

(1)

123014

AP

X-IA

KJ939977

b27159

16SrX-A

MH279542

‘Ca. P. mali’

Apple

Germany

(1)

123016

PYLR

X-IC

KJ940010

b27165

16SrX-C

MH279541

‘Ca. P. pyri’

Peach

USA

(1)

123017

ESFY

X-IF

KJ940007

b27166

16SrX-F

MH279543

‘Ca. P. prunorum’

Periwinkle

Italy

(1)

123018

SCWL

XI-ID

MH279493

b31184

16SrXI-D

KC295286

‘Ca. P. oryzae’

Sugarcane

China

(3)

123019

BN44948

XII-IA

KJ939979

b27168

16SrXII-A

MH279537

‘Ca. P. solani’

Periwinkle

Germany

(1)

123020

SbGP-1

XIII-(A/I)I

KT444666

b27178

16SrXIII-A/I8

KT444665 (A); KT444664 (I)

‘Ca. P.hispanicum’

Strawberry

Mexico
(Michoacan)

(4)

123021

PeruPBT

XV-IB

MH279494

b31186

16SrXV-B

KX810334

‘Ca. P. brasiliense’

Papaya

Peru

(3, 5)

123023

1chaperonin database ID (http://cpndb.ca).

2accession number of plasmid at addgene (www.addgene.org). Plasmids are available to the scientific community via this repository.

3plasmid contains the 826 bp product of groEL F/H280p primers (1). Contains cpn60 UT and flanking cpn60 sequences

4plasmid contains the 1.4 kb product of groEL F/R primers (6). Contains cpn60 UT and flanking cpn60 sequences

5sample had F2nR2 sequence heterogeneity (7). The sequence MH279522 was suggested as a new subgroup, 16SrI-AI

6insufficient template volume remains to generate F2nR2 sequence; 16Sr group information provided by S. Malembic-Maher (personal communication)

7NA, not available. The 16S sequence generated from this sample was too short for iPhyclassifier (714 bp), but showed 100% id to GenBank KF941131, which is 16SrIX-A.

8sample had F2nR2 sequence heterogeneity (4).


  1. Dumonceaux TJ, Green M, Hammond C, Perez E, Olivier C. 2014. Molecular diagnostic tools for detection and differentiation of phytoplasmas based on chaperonin-60 reveal differences in host plant infection patterns. PLoS ONE 9:e116039.
  2. Pérez-López E, Olivier CY, Luna-Rodríguez M, Dumonceaux TJ. 2016. Phytoplasma classification and phylogeny based on in silico and in vitro RFLP analysis of cpn60 universal target sequences. International Journal of Systematic and Evolutionary Microbiology 66:5600-5613.
  3. Muirhead K, Pérez-López E, Bahder BW, Hill JE, Dumonceaux T. 2019. The CpnClassiPhyR facilitates phytoplasma classification and taxonomy using cpn60 universal target sequences, p in press. In Olivier C, Dumonceaux T, Perez-Lopez E (ed), Sustainable management of phytoplasma diseases in crops grown in the tropical belt.
  4. Pérez-López E, Dumonceaux TJ. 2016. Detection and identification of the heterogeneous novel subgroup 16SrXIII-(A/I)I phytoplasma associated with strawberry green petal disease and Mexican periwinkle virescence. International Journal of Systematic and Evolutionary Microbiology 66:4406-4415.
  5. Wei W, Pérez-López E, Davis RE, Bermúdez-Díaz L, Granda-Wong C, Wang J, Zhao Y. 2017. ‘Candidatus Phytoplasma brasiliense’-related strains associated with papaya bunchy top disease in northern Peru represent a distinct geographic lineage. Crop Protection 92:99-106.
  6. Mitrović J, Kakizawa S, Duduk B, Oshima K, Namba S, Bertaccini A. 2011. The groEL gene as an additional marker for finer differentiation of 'Candidatus Phytoplasma asteris'-related strains. Annals of Applied Biology 159:41-48.
  7. Perez-Lopez E, Vincent C, Moreau D, Hammond C, Town J, Dumonceaux TJ. 2018. A novel ‘Candidatus Phytoplasma asteris’ subgroup 16SrI-(E/AI)AI associated with blueberry stunt disease in eastern Canada. International Journal of Systematic and Evolutionary Microbiology doi:10.1099/ijsem.0.003100.