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Search by protein name, UniProt number, IPI number, or 15 AA P-site sequence.
Updated November 2019
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Protein Info
Short Name:
SFRS4
Full Name:
Serine/arginine-rich splicing factor 4
Alias:
Arginine/serine-rich 4; Pre-mRNA splicing factor SRP75; Pre-mRNA-splicing factor SRP75; SFR4; Splicing factor; SRP001LB; SRP75
Type:
Nuclear speck, Nucleus protein; RNA binding protein
Mass (Da):
56678
Number AA:
494
UniProt ID:
Q08170
International Prot ID:
IPI00000015
Sequence:
Retrieve full protein sequence
GO Terms
External Links
Internal Links
Cellular Component:
GO:0016607
GO:0043226
GO:0043227
Uniprot
OncoNet
Molecular Function:
GO:0003723
GO:0000166
GO:0003723
PhosphoSite+
KinaseNET
Biological Process:
GO:0000398
GO:0000377
GO:0000398
Phosida
TranscriptoNet
STRING
Kinexus Products
Info Box
A variety of parameters were considered in the selection of putative P-sites. Confirmed P-Sites have lower Hydrophobicity Scores. The P-site Similarity Score is lower the more that it resembles typical confirmed corresponding P-Ser, P-Thr or P-Tyr sites. The Maximum KInase Score provides the calculated score for highest match of 500 human protein kinases for the amino acid sequence surrounding the target P-site as determined with Kinase Substrate Predictor V2. The Sum KInase Score provides the additive sum of the positive individual Kinase Substrate Predictor V2 scores from 500 human protein kinases. The Conservation Score is the average of the percent similarity of the human P-site with the equivalent P-site in 20 other diverse species. Click the coloured buttons below to retrieve this and other information in the Info Box, or click the orange buttons for relevant links.
Phosphosites
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
Expt. conf.
Effect
Kinase
PPase
Kinexus Products
Ref.
Evol.
Kinase Pred.
P-site Match
Site 1
S10
R
V
Y
I
G
R
L
S
Y
Q
A
R
E
R
D
Site 2
Y11
V
Y
I
G
R
L
S
Y
Q
A
R
E
R
D
V
Site 3
Y25
V
E
R
F
F
K
G
Y
G
K
I
L
E
V
D
Site 4
Y53
R
D
A
D
D
A
V
Y
E
L
N
G
K
D
L
Site 5
S78
R
G
P
R
R
D
G
S
Y
G
S
G
R
S
G
Site 6
Y79
G
P
R
R
D
G
S
Y
G
S
G
R
S
G
Y
Site 7
S81
R
R
D
G
S
Y
G
S
G
R
S
G
Y
G
Y
Site 8
S84
G
S
Y
G
S
G
R
S
G
Y
G
Y
R
R
S
Site 9
Y86
Y
G
S
G
R
S
G
Y
G
Y
R
R
S
G
R
Site 10
Y88
S
G
R
S
G
Y
G
Y
R
R
S
G
R
D
K
Site 11
S91
S
G
Y
G
Y
R
R
S
G
R
D
K
Y
G
P
Site 12
Y96
R
R
S
G
R
D
K
Y
G
P
P
T
R
T
E
Site 13
Y104
G
P
P
T
R
T
E
Y
R
L
I
V
E
N
L
Site 14
S112
R
L
I
V
E
N
L
S
S
R
C
S
W
Q
D
Site 15
S113
L
I
V
E
N
L
S
S
R
C
S
W
Q
D
L
Site 16
S116
E
N
L
S
S
R
C
S
W
Q
D
L
K
D
Y
Site 17
Y123
S
W
Q
D
L
K
D
Y
M
R
Q
A
G
E
V
Site 18
S149
E
G
V
I
E
F
V
S
Y
S
D
M
K
R
A
Site 19
S151
V
I
E
F
V
S
Y
S
D
M
K
R
A
L
E
Site 20
T163
A
L
E
K
L
D
G
T
E
V
N
G
R
K
I
Site 21
S179
L
V
E
D
K
P
G
S
R
R
R
R
S
Y
S
Site 22
S184
P
G
S
R
R
R
R
S
Y
S
R
S
R
S
H
Site 23
Y185
G
S
R
R
R
R
S
Y
S
R
S
R
S
H
S
Site 24
S186
S
R
R
R
R
S
Y
S
R
S
R
S
H
S
R
Site 25
S188
R
R
R
S
Y
S
R
S
R
S
H
S
R
S
R
Site 26
S190
R
S
Y
S
R
S
R
S
H
S
R
S
R
S
R
Site 27
S192
Y
S
R
S
R
S
H
S
R
S
R
S
R
S
R
Site 28
S196
R
S
H
S
R
S
R
S
R
S
R
H
S
R
K
Site 29
S198
H
S
R
S
R
S
R
S
R
H
S
R
K
S
R
Site 30
S201
S
R
S
R
S
R
H
S
R
K
S
R
S
R
S
Site 31
S204
R
S
R
H
S
R
K
S
R
S
R
S
G
S
S
Site 32
S206
R
H
S
R
K
S
R
S
R
S
G
S
S
K
S
Site 33
S208
S
R
K
S
R
S
R
S
G
S
S
K
S
S
H
Site 34
S210
K
S
R
S
R
S
G
S
S
K
S
S
H
S
K
Site 35
S211
S
R
S
R
S
G
S
S
K
S
S
H
S
K
S
Site 36
S213
S
R
S
G
S
S
K
S
S
H
S
K
S
R
S
Site 37
S214
R
S
G
S
S
K
S
S
H
S
K
S
R
S
R
Site 38
S216
G
S
S
K
S
S
H
S
K
S
R
S
R
S
R
Site 39
S218
S
K
S
S
H
S
K
S
R
S
R
S
R
S
G
Site 40
S220
S
S
H
S
K
S
R
S
R
S
R
S
G
S
R
Site 41
S222
H
S
K
S
R
S
R
S
R
S
G
S
R
S
R
Site 42
S224
K
S
R
S
R
S
R
S
G
S
R
S
R
S
K
Site 43
S226
R
S
R
S
R
S
G
S
R
S
R
S
K
S
R
Site 44
S228
R
S
R
S
G
S
R
S
R
S
K
S
R
S
R
Site 45
S230
R
S
G
S
R
S
R
S
K
S
R
S
R
S
Q
Site 46
S232
G
S
R
S
R
S
K
S
R
S
R
S
Q
S
R
Site 47
S234
R
S
R
S
K
S
R
S
R
S
Q
S
R
S
R
Site 48
S236
R
S
K
S
R
S
R
S
Q
S
R
S
R
S
K
Site 49
S238
K
S
R
S
R
S
Q
S
R
S
R
S
K
K
E
Site 50
S240
R
S
R
S
Q
S
R
S
R
S
K
K
E
K
S
Site 51
S242
R
S
Q
S
R
S
R
S
K
K
E
K
S
R
S
Site 52
S247
S
R
S
K
K
E
K
S
R
S
P
S
K
E
K
Site 53
S249
S
K
K
E
K
S
R
S
P
S
K
E
K
S
R
Site 54
S251
K
E
K
S
R
S
P
S
K
E
K
S
R
S
R
Site 55
S255
R
S
P
S
K
E
K
S
R
S
R
S
H
S
A
Site 56
S257
P
S
K
E
K
S
R
S
R
S
H
S
A
G
K
Site 57
S259
K
E
K
S
R
S
R
S
H
S
A
G
K
S
R
Site 58
S261
K
S
R
S
R
S
H
S
A
G
K
S
R
S
K
Site 59
S265
R
S
H
S
A
G
K
S
R
S
K
S
K
D
Q
Site 60
S267
H
S
A
G
K
S
R
S
K
S
K
D
Q
A
E
Site 61
S269
A
G
K
S
R
S
K
S
K
D
Q
A
E
E
K
Site 62
S288
D
N
V
G
K
P
K
S
R
S
P
S
R
H
K
Site 63
S290
V
G
K
P
K
S
R
S
P
S
R
H
K
S
K
Site 64
S292
K
P
K
S
R
S
P
S
R
H
K
S
K
S
K
Site 65
S296
R
S
P
S
R
H
K
S
K
S
K
S
R
S
R
Site 66
S298
P
S
R
H
K
S
K
S
K
S
R
S
R
S
Q
Site 67
S300
R
H
K
S
K
S
K
S
R
S
R
S
Q
E
R
Site 68
S302
K
S
K
S
K
S
R
S
R
S
Q
E
R
R
V
Site 69
S304
K
S
K
S
R
S
R
S
Q
E
R
R
V
E
E
Site 70
S316
V
E
E
E
K
R
G
S
V
S
R
G
R
S
Q
Site 71
S318
E
E
K
R
G
S
V
S
R
G
R
S
Q
E
K
Site 72
S322
G
S
V
S
R
G
R
S
Q
E
K
S
L
R
Q
Site 73
S326
R
G
R
S
Q
E
K
S
L
R
Q
S
R
S
R
Site 74
S330
Q
E
K
S
L
R
Q
S
R
S
R
S
R
S
K
Site 75
S332
K
S
L
R
Q
S
R
S
R
S
R
S
K
G
G
Site 76
S334
L
R
Q
S
R
S
R
S
R
S
K
G
G
S
R
Site 77
S336
Q
S
R
S
R
S
R
S
K
G
G
S
R
S
R
Site 78
S340
R
S
R
S
K
G
G
S
R
S
R
S
R
S
R
Site 79
S342
R
S
K
G
G
S
R
S
R
S
R
S
R
S
K
Site 80
S344
K
G
G
S
R
S
R
S
R
S
R
S
K
S
K
Site 81
S346
G
S
R
S
R
S
R
S
R
S
K
S
K
D
K
Site 82
S348
R
S
R
S
R
S
R
S
K
S
K
D
K
R
K
Site 83
S350
R
S
R
S
R
S
K
S
K
D
K
R
K
G
R
Site 84
S360
K
R
K
G
R
K
R
S
R
E
E
S
R
S
R
Site 85
S364
R
K
R
S
R
E
E
S
R
S
R
S
R
S
R
Site 86
S366
R
S
R
E
E
S
R
S
R
S
R
S
R
S
K
Site 87
S368
R
E
E
S
R
S
R
S
R
S
R
S
K
S
E
Site 88
S370
E
S
R
S
R
S
R
S
R
S
K
S
E
R
S
Site 89
S372
R
S
R
S
R
S
R
S
K
S
E
R
S
R
K
Site 90
S374
R
S
R
S
R
S
K
S
E
R
S
R
K
R
G
Site 91
S377
S
R
S
K
S
E
R
S
R
K
R
G
S
K
R
Site 92
S382
E
R
S
R
K
R
G
S
K
R
D
S
K
A
G
Site 93
S386
K
R
G
S
K
R
D
S
K
A
G
S
S
K
K
Site 94
S390
K
R
D
S
K
A
G
S
S
K
K
K
K
K
E
Site 95
S391
R
D
S
K
A
G
S
S
K
K
K
K
K
E
D
Site 96
T399
K
K
K
K
K
E
D
T
D
R
S
Q
S
R
S
Site 97
S402
K
K
E
D
T
D
R
S
Q
S
R
S
P
S
R
Site 98
S404
E
D
T
D
R
S
Q
S
R
S
P
S
R
S
V
Site 99
S406
T
D
R
S
Q
S
R
S
P
S
R
S
V
S
K
Site 100
S408
R
S
Q
S
R
S
P
S
R
S
V
S
K
E
R
Site 101
S410
Q
S
R
S
P
S
R
S
V
S
K
E
R
E
H
Site 102
S412
R
S
P
S
R
S
V
S
K
E
R
E
H
A
K
Site 103
S420
K
E
R
E
H
A
K
S
E
S
S
Q
R
E
G
Site 104
S422
R
E
H
A
K
S
E
S
S
Q
R
E
G
R
G
Site 105
S423
E
H
A
K
S
E
S
S
Q
R
E
G
R
G
E
Site 106
S431
Q
R
E
G
R
G
E
S
E
N
A
G
T
N
Q
Site 107
T436
G
E
S
E
N
A
G
T
N
Q
E
T
R
S
R
Site 108
T440
N
A
G
T
N
Q
E
T
R
S
R
S
R
S
N
Site 109
S442
G
T
N
Q
E
T
R
S
R
S
R
S
N
S
K
Site 110
S444
N
Q
E
T
R
S
R
S
R
S
N
S
K
S
K
Site 111
S446
E
T
R
S
R
S
R
S
N
S
K
S
K
P
N
Site 112
S448
R
S
R
S
R
S
N
S
K
S
K
P
N
L
P
Site 113
S450
R
S
R
S
N
S
K
S
K
P
N
L
P
S
E
Site 114
S456
K
S
K
P
N
L
P
S
E
S
R
S
R
S
K
Site 115
S458
K
P
N
L
P
S
E
S
R
S
R
S
K
S
A
Site 116
S460
N
L
P
S
E
S
R
S
R
S
K
S
A
S
K
Site 117
S462
P
S
E
S
R
S
R
S
K
S
A
S
K
T
R
Site 118
S464
E
S
R
S
R
S
K
S
A
S
K
T
R
S
R
Site 119
S466
R
S
R
S
K
S
A
S
K
T
R
S
R
S
K
Site 120
T468
R
S
K
S
A
S
K
T
R
S
R
S
K
S
R
Site 121
S470
K
S
A
S
K
T
R
S
R
S
K
S
R
S
R
Site 122
S472
A
S
K
T
R
S
R
S
K
S
R
S
R
S
A
Site 123
S474
K
T
R
S
R
S
K
S
R
S
R
S
A
S
R
Site 124
S476
R
S
R
S
K
S
R
S
R
S
A
S
R
S
P
Site 125
S478
R
S
K
S
R
S
R
S
A
S
R
S
P
S
R
Site 126
S480
K
S
R
S
R
S
A
S
R
S
P
S
R
S
R
Site 127
S482
R
S
R
S
A
S
R
S
P
S
R
S
R
S
R
Site 128
S484
R
S
A
S
R
S
P
S
R
S
R
S
R
S
H
Site 129
S486
A
S
R
S
P
S
R
S
R
S
R
S
H
S
R
Site 130
S488
R
S
P
S
R
S
R
S
R
S
H
S
R
S
_
Site 131
S490
P
S
R
S
R
S
R
S
H
S
R
S
_
_
_
Site 132
S492
R
S
R
S
R
S
H
S
R
S
_
_
_
_
_
Legend
Confirmed in mammals
Confirmed in related proteins or other species
Predicted by Kinexus P-Site Prediction algorithm
No data/link available
Link available
Products available
2019 Kinexus Bioinformatics Corporation