trypanosomy v lidské krvi

Trypanosomy v lidské krvi

Euglenozoans are unicellular flagellates that include free-living, commensalic and parasitic species

EuglenidsDiplonemidsKinetoplastids

the sampling of trypanosomatids in Neotropical Heteroptera

trypanosomes

• Kinetoplastid flagellates causing disease: >300.000.000 patients worldwide

Leishmaniasis Chagas’ disease Sleeping sickness

Trypanosomabrucei

Trypanosoma brucei T.brucei gambienseT. brucei rhodesienseT. brucei brucei

tse-tse fly vector

life cycle

distribution

kDNA is organized as a disc with minicircles kDNA is organized as a disc with minicircles stretched taut and aligned parallel to the axis of stretched taut and aligned parallel to the axis of

the kDNA discthe kDNA disc

mitochondrion

kDNA

Kinetoplast (or kDNA) genome of kinetoplastid flagellates

gRNA 1

gRNA 2

gRNA 3

~1kb

ND8

ND9

ND7

COII

MURF2CR4

CR5

RPS12

A6CYb

COIII

CR322kb

Trypanosoma brucei

Topo II

KinetoflagellarZone

SSE1(RNase H)

Pol

Primase

UMSBP

Pol -PAK

Pol1B

Pol1C

Antipodalsite

The kinetoplast DNA replication model

+

IscS1Frataxin

(komplex ?)IscA

Ferredoxin 1

Ferredoxin 2

Zájmové mitochondriální proteiny

1. Fe-S klastery 2. RNA editing a RNA procesing3. proteiny konzervované mezi člověkem, kvasinkou a trypanosomou o nichž se nic neví4. Podjednotky respiračního řetězce5. Import a modifikace tRNA

GAP1 and 2 are lethal also in the bloodstream stage

Northern and Western analysis showing downregulation of the GAP proteins

Growth curves of GAP knock-downs

gRNAs disappear in theabsence of GAP proteins

Mrs3/4

IscSIsd11

Frataxin

Atm1?

apoprotein

cysteine

alanine

Fe2+

S0

Grx5

eFdx

IscUsubstrate

ISC machinery

Hsp70

DnaJ Mge

IscA

Erv1, GSH

Iba57?

TCA

Nfu

Fe

S

ATP

FOR-NADH

SFe

Fe

Complex I

Ind

mitochondrion

S

SFe

FeS

apoprotein

ss

Narf

Nbp35S

Fe

Fe

S

Cfd1

WD40ssS

Fe

Fe

S

X?

Central Dogma of Molecular Biology

T. brucei ATPase 6 mRNA

AAAAAUAAGUAUUUUGAUAUUAUUAAAGUAAAAGAGGAAUUUUGGGCGGAAGAGAAGGA

GACAGGAGAGGAAAUGAAGGAGAAAGGUUUUGAGAGGGGGGUUUUUUGAGGGGAGGAAA

AAGAAUUUUGAAUUUGAACUAUUUGUUUAAGUUAUGGGAGAGAAGCAAGGAGGAGAAAA

GUAGGGGAAUUUUGAGGAGAUUCUUGGGGAGAGGCGGGCGGGCGACGGCGGUUUUGAAA

ACACCCAUUUUUAGGAGGAUAAGAGGGGAGAAAAGGGGAAAUGGAAUUGGGAAUUGCCU

UUGCCAAACUUUUAGAAGAAAGAGCAGGAAAGGUUAGGGGGAGGAGAGAAGAAAGGGAA

AGUUGUGAUUUUGGAGUUAUAGAAUAAGAUCAAAUAAGUUAAUAAUA

M K E K G F E R G V F W G E E

K E F W I W T I C L S Y G R E A R R R

K V G E F W G D S W G E A G G R R R F

W K H P F L G G ter E G R K G E M E L G I

A F A K L L E E R A G K V R G R R E E

R E S C D F G V I E ter D Q I S terter

pre-edited







AGUUGUGA**UUGGAGUUAUAGAAUAAGAUCAAAUAAGUUAAUAAUA







AGUUGuuUGuuA**UUGGAGUUAUAGAAUAAGAUCAAAUAAGUUAAUAAUA






UUGCCAAACUUUUAGAAGAAAGAGCAGGAAAGGUUAGGGGGAGGAGAGAAGAAAGuuGu

uGAAAuuuG**GuuUGuuA**UUGGAGUUAUAGAAUAAGAUCAAAUAAGUUAAUAAUA






UUGCCAAACUUUUAGAAGAAAGAGCAGGAAAGGUUAGGGGGuuuAGuuuuGuAuuuGAu

uuuuGAuAGuuAuuAuAuuGuuGuuGAAAuuuG**GuuUGuuA**UUGGAGUUAUAGAA

UAAGAUCAAAUAAGUUAAUAAUA






UUGCCAAACUUUUAGAAGAAAGAGCAGGAAAGG**AuuuuuuGuuGuuuuuGuuGuuuG

uuuAGuuuuGuAuuuGAuuuuuGAuAGuuAuuAuAuuGuuGuuGAAAuuuG**GuuUGu

uA**UUGGAGUUAUAGAAUAAGAUCAAAUAAGUUAAUAAUA





ACACCCAUUUUUAGGAGGAUAAGAGGGGAGAAAAGGGGAAAUGGAAuUUGuuGGAuuuA

UUuGCC***GCCAuAuuAC****AGuuAuuuAuuuuuuGuAAuAuGAuuuuGCAGuuGA

uAAuGG**AuuuuuuGuuGuuuuuGuuGuuuGuuuAGuuuuGuAuuuGAuuuuuGAuAG

uuAuuAuAuuGuuGuuGAAAuuuG**GuuUGuuA**UUGGAGUUAUAGAAUAAGAUCAA

AUAAGUUAAUAAUA





ACACCCAUUUUUAGGAGGAUAAGAGGGGAGAAAAGGGGuuuAuuAuuuuAUGuGuuuuu

AuAuUUGuuGGAuuuAUUuGCC***GCCAuAuuAC****AGuuAuuuAuuuuuuGuAAu

AuGAuuuuGCAGuuGAuAAuGG**AuuuuuuGuuGuuuuuGuuGuuuGuuuAGuuuuGu

AuuuGAuuuuuGAuAGuuAuuAuAuuGuuGuuGAAAuuuG**GuuUGuuA**UUGGAGU

UAUAGAAUAAGAUCAAAUAAGUUAAUAAUA





ACACCCAUUUUUAGGAGGAUAAGAGGGuuuuuuGuuAuuGAuuuAuuuuAuuuAuuuuu

GuGuuuuGuuuuuGuuuAuuAuuuuAUGuGuuuuuAuAuUUGuuGGAuuuAUUuGCC**

*GCCAuAuuAC****AGuuAuuuAuuuuuuGuAAuAuGAuuuuGCAGuuGAuAAuGG**

AuuuuuuGuuGuuuuuGuuGuuuGuuuAGuuuuGuAuuuGAuuuuuGAuAGuuAuuAuA

uuGuuGuuGAAAuuuG**GuuUGuuA**UUGGAGUUAUAGAAUAAGAUCAAAUAAGUUA

AUAAUA





ACACCCAUUUUUAGGAGGAUAuuuuAuuuuuGuuuuuuuuuuuuAGGGuuuuuuGuuAu

uGAuuuAuuuuAuuuAuuuuuGuGuuuuGuuuuuGuuuAuuAuuuuAUGuGuuuuuAuA

uUUGuuGGAuuuAUUuGCC***GCCAuAuuAC****AGuuAuuuAuuuuuuGuAAuAuG

AuuuuGCAGuuGAuAAuGG**AuuuuuuGuuGuuuuuGuuGuuuGuuuAGuuuuGuAuu

uGAuuuuuGAuAGuuAuuAuAuuGuuGuuGAAAuuuG**GuuUGuuA**UUGGAGUUAU

AGAAUAAGAUCAAAUAAGUUAAUAAUA




GUAGGGGAAUUUUGAGGAGuuuuuuuuAUUC**GuuuuuuGuuGuGuuuuuuAGAGuGu

uuuuCuuuGuuGuGuCGuuGuuuGuCGACGuuuuuGCGuuuGUUUUGuAAuuuAuuAuC

AuCCCAuUUUUUAuuGuuGAuGuuuuuuGAuuuuuuuUAuuuuAuuuuuGuuuuuuuuu

uuuAGGGuuuuuuGuuAuuGAuuuAuuuuAuuuAuuuuuGuGuuuuGuuuuuGuuuAuu

AuuuuAUGuGuuuuuAuAuUUGuuGGAuuuAUUuGCC***GCCAuAuuAC****AGuuA

uuuAuuuuuuGuAAuAuGAuuuuGCAGuuGAuAAuGG**AuuuuuuGuuGuuuuuGuuG

uuuGuuuAGuuuuGuAuuuGAuuuuuGAuAGuuAuuAuAuuGuuGuuGAAAuuuG**Gu

uUGuuA**UUGGAGUUAUAGAAUAAGAUCAAAUAAGUUAAUAAUA



AAGAAUUUUGAAUUUGAACUAUUUGUUUAAGUUAUGGGAGAGAuAuuGCAuuuuuAuuu

uuGuuuuGuuuuuuAuGuGAuuuuuuuuuGuuuAAuAAuuuGuUAGuuGGuGAuA****

GuuuuAuGGAuGuuuuuuuuAUUC**GuuuuuuGuuGuGuuuuuuAGAGuGuuuuuCuu

uGuuGuGuCGuuGuuuGuCGACGuuuuuGCGuuuGUUUUGuAAuuuAuuAuCAuCCCAu

UUUUUAuuGuuGAuGuuuuuuGAuuuuuuuUAuuuuAuuuuuGuuuuuuuuuuuuAGGG

uuuuuuGuuAuuGAuuuAuuuuAuuuAuuuuuGuGuuuuGuuuuuGuuuAuuAuuuuAU

GuGuuuuuAuAuUUGuuGGAuuuAUUuGCC***GCCAuAuuAC****AGuuAuuuAuuu

uuuGuAAuAuGAuuuuGCAGuuGAuAAuGG**AuuuuuuGuuGuuuuuGuuGuuuGuuu

AGuuuuGuAuuuGAuuuuuGAuAGuuAuuAuAuuGuuGuuGAAAuuuG**GuuUGuuA*

*UUGGAGUUAUAGAAUAAGAUCAAAUAAGUUAAUAAUA



AAGAAUUUUGAAUUUGAACuUAUUUG***AAuuuG*UAuuUGuuGuuuuGuAuuGuuuu

uuuAuuGuAuAuuGCAuuuuuAuuuuuGuuuuGuuuuuuAuGuGAuuuuuuuuuGuuuA

AuAAuuuGuUAGuuGGuGAuA****GuuuuAuGGAuGuuuuuuuuAUUC**GuuuuuuG

uuGuGuuuuuuAGAGuGuuuuuCuuuGuuGuGuCGuuGuuuGuCGACGuuuuuGCGuuu

GUUUUGuAAuuuAuuAuCAuCCCAuUUUUUAuuGuuGAuGuuuuuuGAuuuuuuuUAuu

uuAuuuuuGuuuuuuuuuuuuAGGGuuuuuuGuuAuuGAuuuAuuuuAuuuAuuuuuGu

GuuuuGuuuuuGuuuAuuAuuuuAUGuGuuuuuAuAuUUGuuGGAuuuAUUuGCC***G

CCAuAuuAC****AGuuAuuuAuuuuuuGuAAuAuGAuuuuGCAGuuGAuAAuGG**Au

uuuuuGuuGuuuuuGuuGuuuGuuuAGuuuuGuAuuuGAuuuuuGAuAGuuAuuAuAuu

GuuGuuGAAAuuuG**GuuUGuuA**UUGGAGUUAUAGAAUAAGAUCAAAUAAGUUAAU

AAUA


GACAGGAGAGGAAAUGAAGGAGAAAGGUUUUGAGAGGGGGGUUUUUUGAGuuGuGGuuu

AuGuuGuuuAAuuuAuAuAGuuuAAUUUUGuAuuA*UUGuAuuACuUAUUUG***AAuu

uG*UAuuUGuuGuuuuGuAuuGuuuuuuuAuuGuAuAuuGCAuuuuuAuuuuuGuuuuG

uuuuuuAuGuGAuuuuuuuuuGuuuAAuAAuuuGuUAGuuGGuGAuA****GuuuuAuG

GAuGuuuuuuuuAUUC**GuuuuuuGuuGuGuuuuuuAGAGuGuuuuuCuuuGuuGuGu

CGuuGuuuGuCGACGuuuuuGCGuuuGUUUUGuAAuuuAuuAuCAuCCCAuUUUUUAuu

GuuGAuGuuuuuuGAuuuuuuuUAuuuuAuuuuuGuuuuuuuuuuuuAGGGuuuuuuGu

uAuuGAuuuAuuuuAuuuAuuuuuGuGuuuuGuuuuuGuuuAuuAuuuuAUGuGuuuuu

AuAuUUGuuGGAuuuAUUuGCC***GCCAuAuuAC****AGuuAuuuAuuuuuuGuAAu

AuGAuuuuGCAGuuGAuAAuGG**AuuuuuuGuuGuuuuuGuuGuuuGuuuAGuuuuGu

AuuuGAuuuuuGAuAGuuAuuAuAuuGuuGuuGAAAuuuG**GuuUGuuA**UUGGAGU

UAUAGAAUAAGAUCAAAUAAGUUAAUAAUA

AAAAAUAAGUAUUUUGAUAUUAUUAAAGUAAAAGAGGAAUUUUGGGCGGAAGAGAAGGAGA

CAGGAGAGGAuuuuAAuUGuuuAAuGuuGAuuuuuGAuuuuuuAuuAuuuuGuuuG*UUUG

AuuuGuAuuuGuuuGuuGGuuuGuG***UUUGuuuuuAuuGuuGuGGuuuAuGuuGuuuAA

uuuAuAuAGuuuAAUUUUGuAuuA*UUGuAuuACuUAUUUG***AAuuuG*UAuuUGuuGu

uuuGuAuuGuuuuuuuAuuGuAuAuuGCAuuuuuAuuuuuGuuuuGuuuuuuAuGuGAuuu

uuuuuuGuuuAAuAAuuuGuUAGuuGGuGAuA****GuuuuAuGGAuGuuuuuuuuAUUC*

*GuuuuuuGuuGuGuuuuuuAGAGuGuuuuuCuuuGuuGuGuCGuuGuuuGuCGACGuuuu

uGCGuuuGUUUUGuAAuuuAuuAuCAuCCCAuUUUUUAuuGuuGAuGuuuuuuGAuuuuuu

uUAuuuuAuuuuuGuuuuuuuuuuuuAGGGuuuuuuGuuAuuGAuuuAuuuuAuuuAuuuu

uGuGuuuuGuuuuuGuuuAuuAuuuuAUGuGuuuuuAuAuUUGuuGGAuuuAUUuGCC***

GCCAuAuuAC****AGuuAuuuAuuuuuuGuAAuAuGAuuuuGCAGuuGAuAAuGG**Auu

uuuuGuuGuuuuuGuuGuuuGuuuAGuuuuGuAuuuGAuuuuuGAuAGuuAuuAuAuuGuu

GuuGAAAuuuG**GuuUGuuA**UUGGAGUUAUAGAAUAAGAUCAAAUAAGUUAAUAAUA

AAAAAUAAGUAUUUUGAUAUUAUUAAAGUAAAAGuuuuuAuuuuuuuuuuGuGAuuuAU

UUUGGuuGCGuuuGuuAuuAuGuAuGuAuuAuuGuGuAuGAuCuAGGuuAuGuuuuAuu

GuGuAuuuuAAuUGuuuAAuGuuGAuuuuuGAuuuuuuAuuAuuuuGuuuG*UUUGAuu

uGuAuuuGuuuGuuGGuuuGuG***UUUGuuuuuAuuGuuGuGGuuuAuGuuGuuuAAu

uuAuAuAGuuuAAUUUUGuAuuA*UUGuAuuACuUAUUUG***AAuuuG*UAuuUGuuG

uuuuGuAuuGuuuuuuuAuuGuAuAuuGCAuuuuuAuuuuuGuuuuGuuuuuuAuGuGA

uuuuuuuuuGuuuAAuAAuuuGuUAGuuGGuGAuA****GuuuuAuGGAuGuuuuuuuu

AUUC**GuuuuuuGuuGuGuuuuuuAGAGuGuuuuuCuuuGuuGuGuCGuuGuuuGuCG

ACGuuuuuGCGuuuGUUUUGuAAuuuAuuAuCAuCCCAuUUUUUAuuGuuGAuGuuuuu

uGAuuuuuuuUAuuuuAuuuuuGuuuuuuuuuuuuAGGGuuuuuuGuuAuuGAuuuAuu

uuAuuuAuuuuuGuGuuuuGuuuuuGuuuAuuAuuuuAUGuGuuuuuAuAuUUGuuGGA

uuuAUUuGCC***GCCAuAuuAC****AGuuAuuuAuuuuuuGuAAuAuGAuuuuGCAG

uuGAuAAuGG**AuuuuuuGuuGuuuuuGuuGuuuGuuuAGuuuuGuAuuuGAuuuuuG

AuAGuuAuuAuAuuGuuGuuGAAAuuuG**GuuUGuuA**UUGGAGUUAUAGAAUAAGA

UCAAAUAAGUUAAUAAUA

AAAAAUAAGUAUUUUGAUAUUAUUAAAGUAAAuAuGuuuuuAuuuuuuuuuuGuGAuuu

AUUUUGGuuGCGuuuGuuAuuAuGuAuGuAuuAuuGuGuAuGAuCuAGGuuAuGuuuuA

uuGuGuAuuuuAAuUGuuuAAuGuuGAuuuuuGAuuuuuuAuuAuuuuGuuuG*UUUGA

uuuGuAuuuGuuuGuuGGuuuGuG***UUUGuuuuuAuuGuuGuGGuuuAuGuuGuuuA

AuuuAuAuAGuuuAAUUUUGuAuuA*UUGuAuuACuUAUUUG***AAuuuG*UAuuUGu

uGuuuuGuAuuGuuuuuuuAuuGuAuAuuGCAuuuuuAuuuuuGuuuuGuuuuuuAuGu

GAuuuuuuuuuGuuuAAuAAuuuGuUAGuuGGuGAuA****GuuuuAuGGAuGuuuuuu

uuAUUC**GuuuuuuGuuGuGuuuuuuAGAGuGuuuuuCuuuGuuGuGuCGuuGuuuGu

CGACGuuuuuGCGuuuGUUUUGuAAuuuAuuAuCAuCCCAuUUUUUAuuGuuGAuGuuu

uuuGAuuuuuuuUAuuuuAuuuuuGuuuuuuuuuuuuAGGGuuuuuuGuuAuuGAuuuA

uuuuAuuuAuuuuuGuGuuuuGuuuuuGuuuAuuAuuuuAUGuGuuuuuAuAuUUGuuG

GAuuuAUUuGCC***GCCAuAuuAC****AGuuAuuuAuuuuuuGuAAuAuGAuuuuGC

AGuuGAuAAuGG**AuuuuuuGuuGuuuuuGuuGuuuGuuuAGuuuuGuAuuuGAuuuu

uGAuAGuuAuuAuAuuGuuGuuGAAAuuuG**GuuUGuuA**UUGGAGUUAUAGAAUAA

GAUCAAAUAAGUUAAUAAUA

editing in progress...edited

M F L F F F C D

L F W L R L L L C M Y Y C V W S R L C F

I V Y F N C L M L I F D F L L F C L F

D L Y L F V G L C L F L L L W F M L

F N L Y S L I L Y Y C I T Y L N L Y

L L F C I V F L L Y I A F L F L F C F

L C D F F L F N N L L V G D S F M D

V F F I R F L L C F L E C F S L L C R

C L S T F L R L F C N L L S S H F L L

L M F F D F F Y F I F V F F F W C F L

L L I Y F I Y F C V L F L F I I L C V F

I F V G F I C R H I T V I Y F L ter

M F L F F F C D

L F W L R L L L C M Y Y C V W S R L C F

I V Y F N C L M L I F D F L L F C L F

D L Y L F V G L C L F L L L W F M L

F N L Y S L I L Y Y C I T Y L N L Y

L L F C I V F L L Y I A F L F L F C F

L C D F F L F N N L L V G D S F M D

V F F I R F L L C F L E C F S L L C R

C L S T F L R L F C N L L S S H F L L

L M F F D F F Y F I F V F F F W C F L

L L I Y F I Y F C V L F L F I I L C V F

I F V G F I C R H I T V I Y F L ter

In T. brucei, extensive RNA editing is the rule: 9 of 18 mRNAs are extensively edited

ND9 MURF5 MURF1 ND1 cox1 G4 ND3

12S 9S ND8 ND7 cox3 cytb ATP6 G3 cox2 MURF2 ND4 RPS12 ND5

edited mRNAs

CYb III

II

Complex I Complex II Complex III Complex IV Complex V

6(a)

3

78

9

Most edited mRNAs encode subunitsof the OxPhos system

Subunits encoded by mitochondrial mRNAs that require editing

Succinatereductase

...AAAGAGCAGGAAAGGUUAGGGGGAGGAGAGAAGAAAGGGAAAGUUGUGAUUUUGGAGUUAUAG... |·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...AAAGAGCAGGAAAGGUUAGGGGGAGGAGAGAAGAAAGGGAAAGUUGUGAUUGGAGUUAUAG... ||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...AAAGAGCAGGAAAGGUUAGGGGGAGGAGAGAAGAAAGGGAAAGUUGUGuuAUUGGAGUUAUAG... ·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...AGAGCAGGAAAGGUUAGGGGGAGGAGAGAAGAAAGGGAAAGUUGuuUGuuAUUGGAGUUAUAG... ·||·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...AAAGAGCAGGAAAGGUUAGGGGGAGGAGAGAAGAAAGGGAAAGGuuUGuuAUUGGAGUUAUAG... |·||·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...GAGCAGGAAAGGUUAGGGGGAGGAGAGAAGAAAGGGAAAuuuGGuuUGuuAUUGGAGUUAUAG... ·||||·||·||·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...GCAGGAAAGGUUAGGGGGAGGAGAGAAGAAAGGuuGAAAuuuGGuuUGuuAUUGGAGUUAUAG... ||··||||·||·||·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...AGGAAAGGUUAGGGGGAGGAGAGAAGAAAGuuGuuGAAAuuuGGuuUGuuAUUGGAGUUAUAG... ··|||··||||·||·||·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...GAAAGGUUAGGGGGAGGAGAGAAGAAAuuGuuGuuGAAAuuuGGuuUGuuAUUGGAGUUAUAG... ||···|||··||||·||·||·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...AAAGGUUAGGGGGAGGAGAGAAGAAuAuuGuuGuuGAAAuuuGGuuUGuuAUUGGAGUUAUAG... ||||···|||··||||·||·||·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...AGGUUAGGGGGAGGAGAGAAGAuuAuAuuGuuGuuGAAAuuuGGuuUGuuAUUGGAGUUAUAG... ||·||||···|||··||||·||·||·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...GUUAGGGGGAGGAGAGAAGuuAuuAuAuuGuuGuuGAAAuuuGGuuUGuuAUUGGAGUUAUAG... |·||||·||||···|||··||||·||·||·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

...UUAGGGGGAGGAGAGAuAGuuAuuAuAuuGuuGuuGAAAuuuGGuuUGuuAUUGGAGUUAUAG... ····|··|·|·|||·||||·||||···|||··||||·||·||·|||||·|||||||||| UUUUUUUUUUUUAUUAAUAGUAUAGUGACAGUUUUAGACUAAGCAAUAGCCUCAAUAUC...

AnchorInformationU Tail

Editing BlockEditing Block

RNA editing is directed by guide RNAs

cox3 mRNA An

edited

unedited

u u

u

u

u

u

uu

gRNAs

gRNAs VII V III I

VIII VI IV II

Direction of editing 3'5'

RNA editing of one mRNA requires several gRNAs

p24

p33

p90

p41

p69

p101

p63

p52

p103

p99

p61

p105

p81

p44

p67

p108

p57

p42

p18

p46

hel61

p48

p10

2

Insertion editing Deletion editing

catalytic

anchorbinding

upstreambinding

EM

Editosome Model

RNA editingThe core machinery: the 20 S editosome

Stuart et al., Trends Genet. 2005

Crystal structure of the MRP1/MRP2 complex

Ribbon diagram with MRP1 in red (subunits A and C) and MRP2 in cyan (subunits B and D)

Schumacher et al., Cell 2006

The GAP proteins are localized in punctuate loci along the reticulatedmitochondrion

Immunolocalization usinganti-GAP1 antibody

Immunolocalization of theHA3-tagged versions ofGAP1 and GAP2

Hashimi et al., RNA, 2009

Kinetoplast DNA network of trypanosomatids

Gradual loss of kinetoplast DNA

Without kDNA they cannot survive in

tse-tse fly but can in mammals (after

some compensatory mutations)

Figure 5

Editosome and accessory proteins are present even in trypanosomes that have completely lost their mitochondrial DNA (+ RNA)

Trypanosoma brucei with kDNA

Trypanosoma evansiwithout kDNA(akinetoplastic; “petite mutant”)

Lai et al., PNAS, 2008

trypanosomy v lidské krvi

Documents

g g ter e g r

g f e r g v f w g e

g g r r r f w

v r g r r e e r e s

s y g r e

v g e f w g d s w g

w t i c

brucei gambienset