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Research Articles: Cellular/Molecular
Ubiquitin C-terminal hydrolase L1 (UCH-L1) promotes hippocampus-dependentmemory via its deubiquitinating effect on TrkB
Yun-Yun Guo1, Lu Yi1, Yuan Zheng2, Xiao-Rong Chen1, Jun-Lu Dong1, Rong-Rong Yuan1, Shu-Hong Huang1, Hui
Yu1, Yue Wang1, Zhe-Yu Chen1 and Bo Su1
1Department of Neurobiology, Shandong Provincial Key Laboratory of Mental Disorders, School of Medicine,Shandong University, Jinan, Shandong 250012, P.R. China.2Department of Pediatrics, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong, 250012,P.R. China.
DOI: 10.1523/JNEUROSCI.3148-16.2017
Received: 8 October 2016
Revised: 21 April 2017
Accepted: 4 May 2017
Published: 12 May 2017
Author contributions: Y.G., Y.L., Y.Z., X.-R.C., J.-L.D., R.-r.Y., and B.S. performed research; Y.G., S.-H.H., H.Y., Y.W., Z.-Y.C., and B.S. analyzed data; Y.G. and B.S. wrote the paper; Z.-Y.C. and B.S. designedresearch.
This work was supported by National 973 Basic Research Program of China (No. 2012CB911004), NationalNatural Science Foundation of China (No. 331571449, 31401219), China Postdoctoral Science Foundation (No.2016M600534) and Shandong Provinical Natural Science Foundation, China (No. ZR2014CQ023). The authorsdeclare no competing financial interests.
Correspondence should be addressed to To whom correspondence should be addressed: Bo Su,Department of Neurobiology, School of Medicine, Shandong University, No.44 Wenhua Xi Road, Jinan,Shandong 250012, P. R. China. Tel: 86-531-88382329, Fax: 86-531-88382329, E-mail: [email protected]
Cite as: J. Neurosci ; 10.1523/JNEUROSCI.3148-16.2017
Alerts: Sign up at www.jneurosci.org/cgi/alerts to receive customized email alerts when the fully formattedversion of this article is published.
In vivo
in vivo
in vitro
in vivo
°
Experiment 1. UCH-L1 promotes CFC memory by regulating TrkB
Experiment 2: UCH-L1 interacts with TrkB
In vitro
Experiment 3: Mapping the TrkB/UCH-L1 interaction domain
Experiment 4: UCH-L1 regulates TrkB ubiquitination as a deubiquitinating enzyme
in
vitro
Experiment 5: Study of the ubiquitination site in TrkB regulated by UCH-L1
Experiment 6: The effects of Tat-UCH-L175-85 on ubiquitination of TrkB, TrkB
degradation and intracellular trafficking
Experiment 7: The effects of Tat-UCH-L175-85 on TrkB and its downstream
signaling pathways.
Experiment 8: The effects of Tat-UCH-L175-85 on CFC learning and memory
Statistical Analysis
in vivo
F
F
F
F
F
F
F
in vitro in vivo
F
in vivo
in vitro
F
F
α
α
α
F
F
in vitro
in vivo.
in vivo
in vivo
in vivo
In vitro
in
vitro
in vitro
α. ΗΕΚ293 α
α
AFigure1.
shRNA TrkB UCH-L1 DAPI Merge
B
TrkB
Con shTrkB Con shTrkB
DG Other hip Cortex StriatumDG Other hip Cortex Striatum
Con UCH-L1
UCH-L1 Con shTrkB Con shTrkB Con UCH-L1 Con UCH-L1 Con UCH-L1
C
D E
P4D1
TrkB
TrkB
UCH-L1
OE UCH-L1
sh TrkBOE UCH-L1 & sh TrkB
145kD
25kD55kD
IP:TrkB
Lysate
F H
G
OE UCH-L1 sh TrkB OE UCH-L1& shTrkB
OE UCH-L1 sh TrkB OE UCH-L1& shTrkB
I
T T T0
20
40
60
80OE UCH-L1ANA-12OE UCH-L1 & ANA-12
0
20
400
60
80
OE UCH-L1 ANA12 OE UCH-L1& ANA12
*
J
pY99
TrkB
UCH-L1
IP:T
rkB
Lysa
te
TrkB
OE UCH-L1
ANA-12
OE UCH-L1 & ANA-12
K
OE UCH-L1 ANA12 OE UCH-L1& ANA12
L
**
**pY99
/Trk
B
0
0.4
0.8
1.2
1.4
**
15 days
Conditioning STM
1 Hour
Contro S r shTrkB shTrkB & TrkB
wt UCH-L1
C90S UCH-L1
M N
0
0.2
0.4
0.6
0.8
1
1.2
#****
kB
0
0.5
1
1.5
2
2.5
*
**
145kD
145kD
145kD
25kD42kD
Con S r shTrkBshTrkB & TrkB
wt UCH-L1
C90S UCH-L1
0
20
40
60
80
100
&
TrkB
Con
100
#
OE wt UCH-L1
shTrkB
OE C90S UCH-L1
shTrkB & OE TrkB
shTrkB & OE UCH-L1
0
20
40
60
80**##
##
##100
shTrkBwt UCH-L1
25kD55kD
145kD
55kD
25kD42kD
145kD
42kD
##
UCH-L1
145kD
145kD
##
Flag-TrkB
Myc-UCH-L1
FL T1
+ + +
145kD
35kD
145kD
35kD
Myc
Flag
Flag
Myc
IP:Flag
Lysate
A B
Flag-TrkB FL
Myc-UCH-L1 -
+
+
+
Flag
Flag
Myc
Myc
IP: Myc
Lysate
145kD
35kD
145kD
35kD
145kD
145kD
55kD
IgG TrkB
25kD
25kD
TrkB
TrkB
α-tubulin
UCH-L1
UCH-L1
Lysate
IP
C
D E
HA-UCH-L1 +
+
+
Flag
HA
Flag
HA
IP:Flag
Lysate25kD
145kD
25kD
145kD
F
Figure2.
-
-
35kD
145kD
35kD
145kD
-Flag-TrkB KD
Flag-TrkB FL
Myc-UCH-L1
+
+
+++
-
Myc
Flag
Flag
Myc
IP:Flag
Lysate
0
0.2
0.4
0.6
0.8
1
1.2
1.4
The C
O-I
P o
f T
rkB
with U
CH
-L1
TrkB WT TrkB KD
Flag-TrkB FL
IP:
-
-
Myc-UCH-L1
Flag-TrkB FLFlag-JM1
Flag-JM0Flag-ΔJM1
+ + + + +
+- - - -- - - + -
- - -+ -- - -+ -
Myc-UCH-L1
Flag-IL2RFlag-IL2R JM1
+ + + +
- - - +- - + -- + --
C
DFlag-TrkB FL
TrkB FL
TrkB T1
JM1
JM0
ΔJM1
EC TM
JM1
JM TK CT
CT1
AEC TM
Flag-IL 2R
Flag-IL 2R JM1
JM1
B
Figure 3.
145kD 35kD
145kD
35kD
Myc
Flag
Flag
Myc
IP:Flag
Lysate
Myc
Flag
Flag
Myc
IP:Flag
Lysate
145kD 35kD
145kD 35kD
40kD
40kD
UCH-L1 FL 223aa
UCH-L1 1-150aa
UCH-L1 60-223aa
α-helix β-sheet
A
WT
1-150
60-223
+
-
-
-
+
+
-
-
+
+
-
-
+
+
-
-
Myc
Flag
Flag
Myc
IP:Myc
Lysate
145kD
35kD
145kD
35kD
B
C
+ + + + ++ +
1 2 3 4 5 6
Myc
Flag
Flag
Myc
IP:Myc
Lysate
D
Flag-TrkB FL
Myc-UCH-L1
145kD
40kD
145kD
40kD
GFP
Flag
GFP
Flag
25kDIP:Flag
Lysate
GFP-75-85
GFP
- +
+
-+
+
145kD
25kD
145kD
Δ60-75
Δ75-85
Δ85-100
Δ110-125
Δ125-147
Myc-UCH-L11
2
3
4
5
6
WT
60-75
75-85
85-100
110-125
125-147
C90S
D30A
-
+
-
-
-
+
-
+
-
-
+
+
-
+
-
+
Myc
Flag
Flag
Myc
IP:Flag
Lysate
35kD
145kD
35kD145kD 0
0.2
0.4
0.6
0.8
1
1.2
1.4
Th
e C
O-I
P o
f U
CH
-L1
with T
rkB WT
E F G
Wt C90S D30A
*
Figure 4.
-
Myc-U
CH
-L1
Flag-TrkB FL
Myc-U
CH
-L1
Flag-TrkB FLFlag-TrkB FL
0 15 BDNF(min)P4D1 FK1
Ub
TrkB
TrkB
145kD
145kD
145kD
55kD
A
Ub
P4D1 FK1BkrT: PI
0 15
92kD
92kD
92kD
55kD
70kD :PI
nina
B C
0 15 0 15BDNF(min)
Ub
TrkB
TrkB
145kD
145kD
25kD
145kD
55kD
D
BDNF(min) 0 15 0 15
145kD
145kD
25kD
145kD
55kD
TrkB
TrkB
IP:T
rkBUb
E
C90S
++
+
D30A
WT
++
+
++
+++
145kD
145kD
35kD
145kD
+
145kD
25kD
145kD
145kD
+++
++
FIP
:Trk
B
0 15
0 15 0 151 2 3
145kD
145kD
145kD
55kD
Ub
TrkB
TrkB
0 15 BDNF(min)P4D1 K48
0 15 K63
0 15
G
Con BDNF
*
0
25kD
Figure 6
A
K454R
--
+-
++
+-
++
+-
++
+-
++
+-
++
+-
++
+-
++
C
K460R
K464R
K506R
K524R
K533R
FL
145kD
145kD
35kD
145kD HA
Flag
Flag Lysate
IP:Flag
0
0.2
0.4
0.6
0.8
1
1.2
FL K460R K464RK454R K506R K524R K533R
**
D
--
+-
++
+-
++
+-
++
HA-UbMyc-UCHL-1
Myc-UCHL-1HA-Ub
HA
Flag
FlagMyc
Lysate
IP:Flag
145kD
145kD
35kD
145kD
0
0.2
0.4
0.6
0.8
1
1.2
FL KJMR R460K
**
Ubi
quiti
natio
n le
vel o
f Trk
B
**
***** * **
##
B
Flag-TrkB FL WT KJMR R460K
TrkBNO UCH-L1UCH-L1
NO UCH-L1UCH-L1
Ubi
quiti
natio
n le
vel o
f Trk
B
Myc
##
Myc-UCHL1-+
++
++
Flag-TrkB FLTat Con Tat UCH-L175-85
145kD
35kD
145kD
35kD
Myc
Flag
Flag
Myc
A-
-+
--
++
--
++
++
++
+
B
HA
Flag
Myc
Flag
145kD
145kD
35kD
145kD
70kD
Tat UCH-L175-85
HA-UbFlag-TrkB FL
Myc-UCH-L1
C
145kD
145kD
145kD
70kD
55kD
BDNFTat Con Tat UCH-L175-85
P4D1
TrkB
TrkB
BkrT:PI
Tat Con Tat UCH-L175-85
TrkB
Lysa
teIP
:An
D
****
level BkrT ecafrS
)ezla
mroN(
00.2
0.40.60.81.01.2
Tat Con Tat UCH-L175-85
E
F 7
IP:F
lag
Lysa
te IP:F
lag
Lysa
te Lysa
te
ConBDNF
- + - +
BDNF - + - +
##
-
-+
--
++
--
++
++
++
+Tat UCH-L175-85
HA-UbMyc-UCH-L1
HA
Myc
IP:
sLy
sate
100kD100kD
35kD
100kDF 55kD
145kDwt TrkB K460R TrkB
TrkB
G
H
level BkrT ecafrS
)ezla
mroN(
0.20.40.60.81.01.2
0
**
*
wt TrkB K460R TrkB
1.4
- + - +
ConBDNF
42kD 100kD
145kD
55kD
B
DN
F +
A
B
+
-
+
+
-
+
+
-
-
+
+
+
IP:Avidin
Lysate
TrkB
α-tubulin
C
D
Internalized Recycled Merge
BD
NF
B
DN
F +
Ta
t U
CH
L1
75
-85
% R
ecycle
d
H
G
A
mo
un
t a
fte
r R
ew
arm
ing
145kD
55kD
J
BDNF
Strip
of S
urf
ace T
rkB
-FL
Internal+Surface Surface Merge
BD
NF
Ta
t U
CH
L1
75
-85
Ve
hic
le
Figure 8.
Tat Con
**
0
20
40
60
80
100
Tat Con Tat UCH-L175-85
*
80
**
Tat Con Tat UCH-L175-850
20
40
60
100
**
Tat Con Tat UCH-L175-85
1.S
urface
2. S
trip
3. In
tern
aliz
atio
n4. re
warm
ing
IP:Avidin
Lysate
TrkB
α-tubulin
145kD
55kD
% o
f In
tern
aliz
atio
n
% o
f In
tern
aliz
atio
n
1 2 3 1 2 3
Tat UCH-L175-85
1.S
urface
2. S
trip
3. In
tern
aliz
atio
n4. re
warm
ing
Tat Con
Tat UCH-L175-85
80
0
20
40
60
100
0
20
40
60
80
100
Tat Con Tat UCH-L175-85
E
Fof S
urf
ace T
rkB
-FL
% o
f In
tern
aliz
atio
n
40
0
10
20
30
50
**
wt TrkB
wt TrkB K460R TrkB
K460R TrkB
80
0
20
40
60
100
I
% R
ecycle
d
of S
urf
ace T
rkB
-FL
% o
f In
tern
aliz
atio
n
pTrkB
TrkB
pAkt
AktpErk1/2
Erk1/2
GAPDH
BDNF(min) 0 15 0 15
Tat Con Tat UCH-L175-85
6060145kD
62kD
42kD
42kD37kD
145kD
62kD
fold
indu
ctio
n(p
TrkB
/Trk
B)
**
0
0.2
0.4
0.6
0.8
1.0
1.2
**
D
**
*
***
C
A BFigure 9
Tat ConTat UCH-L175-85
Tat ConTat UCH-L175-855 5
0 15 60BDNF(min)
5
0 15 60BDNF(min)
5
fold
indu
ctio
n(p
Akt/A
kt)
00.5
1.0
1.52.02.53.0
3.5
0 15 60BDNF(min)
5
fold
indu
ctio
n(p
ERK1
/2/E
RK1
/2)
0.20.4
0.6
0.8
1.0
1.2
0
Tat ConTat UCH-L175-85
pTrkB
TrkB
BDNF(min) 0 15 0 15 6060wt TrkB K460R TrkB
-tubulin
E
00.5
11.5
22.5
33.5
4
0 15 60
Fold
indu
ctio
n(pT
rkB/
TrkB
)
TrkB WTTrkB K460R
F
**
**
*
BDNF(min)
B C
F
Per
cent
Tim
e Fr
eezi
ng (%
)
80
60
40
20
0
**Tat Con Tat UCH-L175-85
A
D
Figure 10.
Ub
TrkB-FL
TrkB-FL
IP:T
rkB
Lysa
te
70kD
145kD
145kD
145kD
55kD
25kD
25kD
UCH-L1
UCH-L1
Tat ConTat UCH-L175-85
CFC - - + +- -+ ++ +- -
E
Perc
ent T
ime
Free
zing
(%) Tat Con
Tat UCH-L175-85
80
60
40
20
0
TrkB
Ubi
quiti
natio
n
T
NO CFC CFC
Tat ConTat UCH-L175-85
0
2
4
6
8
10
#
**
0
0.2
0.4
0.6
0.8
1
1.2##
**
NO CFC CFC
Tat ConTat UCH-L175-85
NO CFC CFC
*
0
0.5
1.0
1.5
2.0
2.5
Inte
ract
ion
betw
een
UC
H-L
1&Tr
kB)