Amino acid dipepetide frequency for Streptomyces sp. GP55

Apart from single amino acid frequencies one can also calculate so called amino acid dipeptide frequency.

There is 400 possibilites (441 if we consider Xaa as additional 21st amino acid representing all non-standard or unknown amino acids). Thus, if the dipeptides would be present randomly in proteins each amino acid dipeptide should be present with 0.25% frequency. As it is not the case in the nature, for better visablity all more than expected dipepetides are marked by red, and those which are underrepresented are marked by blue in the table.

All values are presented as per milles (‰), therefore need to be multiplied by 10-3.

For more information see sequence space article on Wikipedia.

AlaCysAspGluPheGlyHisIleLysLeuMetAsnProGlnArgSerThrValTrpTyrXaa
Ala
24.03AlaAla: 24.03 ± 0.165
1.126AlaCys: 1.126 ± 0.021
8.662AlaAsp: 8.662 ± 0.056
9.469AlaGlu: 9.469 ± 0.102
3.58AlaPhe: 3.58 ± 0.042
13.861AlaGly: 13.861 ± 0.089
2.83AlaHis: 2.83 ± 0.034
3.828AlaIle: 3.828 ± 0.041
2.62AlaLys: 2.62 ± 0.044
15.33AlaLeu: 15.33 ± 0.125
2.513AlaMet: 2.513 ± 0.033
2.199AlaAsn: 2.199 ± 0.035
7.737AlaPro: 7.737 ± 0.081
4.475AlaGln: 4.475 ± 0.052
9.832AlaArg: 9.832 ± 0.067
5.561AlaSer: 5.561 ± 0.055
7.477AlaThr: 7.477 ± 0.068
12.564AlaVal: 12.564 ± 0.1
1.905AlaTrp: 1.905 ± 0.027
2.444AlaTyr: 2.444 ± 0.034
0.0AlaXaa: 0.0 ± 0.0
Cys
1.093CysAla: 1.093 ± 0.026
0.105CysCys: 0.105 ± 0.007
0.489CysAsp: 0.489 ± 0.016
0.381CysGlu: 0.381 ± 0.012
0.225CysPhe: 0.225 ± 0.011
0.954CysGly: 0.954 ± 0.022
0.204CysHis: 0.204 ± 0.009
0.164CysIle: 0.164 ± 0.009
0.103CysLys: 0.103 ± 0.007
0.807CysLeu: 0.807 ± 0.019
0.122CysMet: 0.122 ± 0.006
0.152CysAsn: 0.152 ± 0.009
0.525CysPro: 0.525 ± 0.015
0.225CysGln: 0.225 ± 0.01
0.641CysArg: 0.641 ± 0.016
0.476CysSer: 0.476 ± 0.014
0.508CysThr: 0.508 ± 0.014
0.604CysVal: 0.604 ± 0.016
0.156CysTrp: 0.156 ± 0.008
0.189CysTyr: 0.189 ± 0.008
0.0CysXaa: 0.0 ± 0.0
Asp
7.043AspAla: 7.043 ± 0.058
0.462AspCys: 0.462 ± 0.015
3.029AspAsp: 3.029 ± 0.038
3.418AspGlu: 3.418 ± 0.04
1.592AspPhe: 1.592 ± 0.024
6.069AspGly: 6.069 ± 0.049
1.466AspHis: 1.466 ± 0.027
1.564AspIle: 1.564 ± 0.027
0.885AspLys: 0.885 ± 0.026
6.206AspLeu: 6.206 ± 0.055
0.691AspMet: 0.691 ± 0.013
0.915AspAsn: 0.915 ± 0.021
4.613AspPro: 4.613 ± 0.045
2.084AspGln: 2.084 ± 0.032
4.821AspArg: 4.821 ± 0.052
2.501AspSer: 2.501 ± 0.032
2.925AspThr: 2.925 ± 0.039
3.835AspVal: 3.835 ± 0.048
1.091AspTrp: 1.091 ± 0.019
1.206AspTyr: 1.206 ± 0.026
0.0AspXaa: 0.0 ± 0.0
Glu
6.909GluAla: 6.909 ± 0.07
0.347GluCys: 0.347 ± 0.011
2.329GluAsp: 2.329 ± 0.035
2.969GluGlu: 2.969 ± 0.04
1.486GluPhe: 1.486 ± 0.023
3.422GluGly: 3.422 ± 0.042
1.527GluHis: 1.527 ± 0.028
1.974GluIle: 1.974 ± 0.029
0.981GluLys: 0.981 ± 0.024
8.086GluLeu: 8.086 ± 0.082
0.733GluMet: 0.733 ± 0.017
0.864GluAsn: 0.864 ± 0.018
3.54GluPro: 3.54 ± 0.051
2.828GluGln: 2.828 ± 0.044
5.177GluArg: 5.177 ± 0.061
2.337GluSer: 2.337 ± 0.032
2.372GluThr: 2.372 ± 0.031
4.374GluVal: 4.374 ± 0.05
0.716GluTrp: 0.716 ± 0.018
1.082GluTyr: 1.082 ± 0.023
0.0GluXaa: 0.0 ± 0.0
Phe
3.768PheAla: 3.768 ± 0.044
0.274PheCys: 0.274 ± 0.011
1.92PheAsp: 1.92 ± 0.029
1.453PheGlu: 1.453 ± 0.029
0.833PhePhe: 0.833 ± 0.02
2.956PheGly: 2.956 ± 0.041
0.645PheHis: 0.645 ± 0.02
0.749PheIle: 0.749 ± 0.019
0.454PheLys: 0.454 ± 0.013
2.479PheLeu: 2.479 ± 0.036
0.369PheMet: 0.369 ± 0.012
0.557PheAsn: 0.557 ± 0.016
1.395PhePro: 1.395 ± 0.022
0.811PheGln: 0.811 ± 0.017
1.675PheArg: 1.675 ± 0.029
1.436PheSer: 1.436 ± 0.028
1.972PheThr: 1.972 ± 0.031
1.987PheVal: 1.987 ± 0.028
0.42PheTrp: 0.42 ± 0.013
0.531PheTyr: 0.531 ± 0.015
0.0PheXaa: 0.0 ± 0.0
Gly
10.961GlyAla: 10.961 ± 0.071
0.895GlyCys: 0.895 ± 0.019
4.719GlyAsp: 4.719 ± 0.05
4.859GlyGlu: 4.859 ± 0.055
2.826GlyPhe: 2.826 ± 0.036
8.74GlyGly: 8.74 ± 0.082
2.362GlyHis: 2.362 ± 0.036
3.285GlyIle: 3.285 ± 0.041
2.045GlyLys: 2.045 ± 0.038
9.942GlyLeu: 9.942 ± 0.083
1.927GlyMet: 1.927 ± 0.028
1.779GlyAsn: 1.779 ± 0.034
5.33GlyPro: 5.33 ± 0.054
3.103GlyGln: 3.103 ± 0.041
7.505GlyArg: 7.505 ± 0.063
5.688GlySer: 5.688 ± 0.06
6.142GlyThr: 6.142 ± 0.062
7.197GlyVal: 7.197 ± 0.086
1.827GlyTrp: 1.827 ± 0.03
2.408GlyTyr: 2.408 ± 0.037
0.0GlyXaa: 0.0 ± 0.0
His
2.606HisAla: 2.606 ± 0.032
0.238HisCys: 0.238 ± 0.01
1.234HisAsp: 1.234 ± 0.025
1.09HisGlu: 1.09 ± 0.023
0.63HisPhe: 0.63 ± 0.017
2.439HisGly: 2.439 ± 0.032
0.751HisHis: 0.751 ± 0.02
0.594HisIle: 0.594 ± 0.019
0.309HisLys: 0.309 ± 0.013
2.613HisLeu: 2.613 ± 0.034
0.307HisMet: 0.307 ± 0.012
0.388HisAsn: 0.388 ± 0.013
2.044HisPro: 2.044 ± 0.03
0.935HisGln: 0.935 ± 0.023
2.202HisArg: 2.202 ± 0.033
1.133HisSer: 1.133 ± 0.024
1.304HisThr: 1.304 ± 0.026
1.445HisVal: 1.445 ± 0.031
0.427HisTrp: 0.427 ± 0.014
0.499HisTyr: 0.499 ± 0.015
0.0HisXaa: 0.0 ± 0.0
Ile
4.829IleAla: 4.829 ± 0.05
0.304IleCys: 0.304 ± 0.012
2.17IleAsp: 2.17 ± 0.037
1.984IleGlu: 1.984 ± 0.029
0.646IlePhe: 0.646 ± 0.017
3.58IleGly: 3.58 ± 0.044
0.641IleHis: 0.641 ± 0.018
0.863IleIle: 0.863 ± 0.021
0.643IleLys: 0.643 ± 0.018
2.225IleLeu: 2.225 ± 0.036
0.432IleMet: 0.432 ± 0.014
0.737IleAsn: 0.737 ± 0.02
1.814IlePro: 1.814 ± 0.033
0.786IleGln: 0.786 ± 0.019
2.256IleArg: 2.256 ± 0.031
1.717IleSer: 1.717 ± 0.029
2.337IleThr: 2.337 ± 0.035
2.374IleVal: 2.374 ± 0.034
0.39IleTrp: 0.39 ± 0.013
0.505IleTyr: 0.505 ± 0.018
0.0IleXaa: 0.0 ± 0.0
Lys
2.493LysAla: 2.493 ± 0.043
0.099LysCys: 0.099 ± 0.006
0.981LysAsp: 0.981 ± 0.027
0.858LysGlu: 0.858 ± 0.024
0.423LysPhe: 0.423 ± 0.012
1.346LysGly: 1.346 ± 0.027
0.409LysHis: 0.409 ± 0.014
0.696LysIle: 0.696 ± 0.021
0.53LysLys: 0.53 ± 0.019
1.884LysLeu: 1.884 ± 0.033
0.329LysMet: 0.329 ± 0.011
0.407LysAsn: 0.407 ± 0.014
1.2LysPro: 1.2 ± 0.027
0.686LysGln: 0.686 ± 0.018
1.212LysArg: 1.212 ± 0.024
0.984LysSer: 0.984 ± 0.023
1.048LysThr: 1.048 ± 0.025
1.593LysVal: 1.593 ± 0.029
0.2LysTrp: 0.2 ± 0.01
0.379LysTyr: 0.379 ± 0.013
0.0LysXaa: 0.0 ± 0.0
Leu
17.552LeuAla: 17.552 ± 0.127
0.868LeuCys: 0.868 ± 0.02
6.783LeuAsp: 6.783 ± 0.054
4.647LeuGlu: 4.647 ± 0.054
2.614LeuPhe: 2.614 ± 0.039
9.849LeuGly: 9.849 ± 0.073
2.474LeuHis: 2.474 ± 0.031
3.376LeuIle: 3.376 ± 0.043
1.723LeuLys: 1.723 ± 0.028
12.737LeuLeu: 12.737 ± 0.112
1.51LeuMet: 1.51 ± 0.028
1.838LeuAsn: 1.838 ± 0.028
7.354LeuPro: 7.354 ± 0.064
2.51LeuGln: 2.51 ± 0.038
9.059LeuArg: 9.059 ± 0.08
5.375LeuSer: 5.375 ± 0.042
7.334LeuThr: 7.334 ± 0.056
9.152LeuVal: 9.152 ± 0.075
1.362LeuTrp: 1.362 ± 0.026
1.768LeuTyr: 1.768 ± 0.026
0.0LeuXaa: 0.0 ± 0.0
Met
2.252MetAla: 2.252 ± 0.035
0.104MetCys: 0.104 ± 0.006
0.827MetAsp: 0.827 ± 0.016
0.612MetGlu: 0.612 ± 0.017
0.413MetPhe: 0.413 ± 0.014
1.169MetGly: 1.169 ± 0.023
0.342MetHis: 0.342 ± 0.013
0.619MetIle: 0.619 ± 0.019
0.328MetLys: 0.328 ± 0.012
1.669MetLeu: 1.669 ± 0.029
0.258MetMet: 0.258 ± 0.011
0.414MetAsn: 0.414 ± 0.014
1.08MetPro: 1.08 ± 0.022
0.433MetGln: 0.433 ± 0.014
1.286MetArg: 1.286 ± 0.024
1.21MetSer: 1.21 ± 0.023
1.479MetThr: 1.479 ± 0.026
1.298MetVal: 1.298 ± 0.021
0.169MetTrp: 0.169 ± 0.008
0.275MetTyr: 0.275 ± 0.012
0.0MetXaa: 0.0 ± 0.0
Asn
2.297AsnAla: 2.297 ± 0.034
0.18AsnCys: 0.18 ± 0.009
0.944AsnAsp: 0.944 ± 0.023
0.761AsnGlu: 0.761 ± 0.019
0.485AsnPhe: 0.485 ± 0.015
2.122AsnGly: 2.122 ± 0.038
0.4AsnHis: 0.4 ± 0.013
0.595AsnIle: 0.595 ± 0.015
0.341AsnLys: 0.341 ± 0.014
1.785AsnLeu: 1.785 ± 0.028
0.291AsnMet: 0.291 ± 0.012
0.416AsnAsn: 0.416 ± 0.015
1.463AsnPro: 1.463 ± 0.028
0.672AsnGln: 0.672 ± 0.018
1.308AsnArg: 1.308 ± 0.025
1.071AsnSer: 1.071 ± 0.025
1.133AsnThr: 1.133 ± 0.029
1.248AsnVal: 1.248 ± 0.023
0.296AsnTrp: 0.296 ± 0.011
0.419AsnTyr: 0.419 ± 0.014
0.0AsnXaa: 0.0 ± 0.0
Pro
10.057ProAla: 10.057 ± 0.095
0.363ProCys: 0.363 ± 0.012
4.313ProAsp: 4.313 ± 0.05
4.198ProGlu: 4.198 ± 0.053
1.588ProPhe: 1.588 ± 0.024
6.884ProGly: 6.884 ± 0.06
1.364ProHis: 1.364 ± 0.024
1.586ProIle: 1.586 ± 0.027
1.074ProLys: 1.074 ± 0.023
5.69ProLeu: 5.69 ± 0.06
0.979ProMet: 0.979 ± 0.019
1.083ProAsn: 1.083 ± 0.021
3.656ProPro: 3.656 ± 0.064
2.239ProGln: 2.239 ± 0.035
3.675ProArg: 3.675 ± 0.046
3.408ProSer: 3.408 ± 0.045
3.752ProThr: 3.752 ± 0.044
5.669ProVal: 5.669 ± 0.058
0.934ProTrp: 0.934 ± 0.018
1.248ProTyr: 1.248 ± 0.026
0.0ProXaa: 0.0 ± 0.0
Gln
4.838GlnAla: 4.838 ± 0.064
0.212GlnCys: 0.212 ± 0.011
1.558GlnAsp: 1.558 ± 0.026
1.507GlnGlu: 1.507 ± 0.027
0.741GlnPhe: 0.741 ± 0.019
2.499GlnGly: 2.499 ± 0.035
0.833GlnHis: 0.833 ± 0.023
1.137GlnIle: 1.137 ± 0.024
0.511GlnLys: 0.511 ± 0.015
4.198GlnLeu: 4.198 ± 0.046
0.479GlnMet: 0.479 ± 0.014
0.585GlnAsn: 0.585 ± 0.016
2.311GlnPro: 2.311 ± 0.045
1.77GlnGln: 1.77 ± 0.039
2.746GlnArg: 2.746 ± 0.036
1.484GlnSer: 1.484 ± 0.028
1.552GlnThr: 1.552 ± 0.029
2.931GlnVal: 2.931 ± 0.034
0.548GlnTrp: 0.548 ± 0.016
0.658GlnTyr: 0.658 ± 0.017
0.0GlnXaa: 0.0 ± 0.0
Arg
9.685ArgAla: 9.685 ± 0.083
0.589ArgCys: 0.589 ± 0.017
3.772ArgAsp: 3.772 ± 0.042
4.407ArgGlu: 4.407 ± 0.051
2.216ArgPhe: 2.216 ± 0.027
5.372ArgGly: 5.372 ± 0.06
2.067ArgHis: 2.067 ± 0.03
3.146ArgIle: 3.146 ± 0.042
1.323ArgLys: 1.323 ± 0.034
9.549ArgLeu: 9.549 ± 0.078
1.556ArgMet: 1.556 ± 0.028
1.28ArgAsn: 1.28 ± 0.024
5.091ArgPro: 5.091 ± 0.06
2.745ArgGln: 2.745 ± 0.033
7.462ArgArg: 7.462 ± 0.082
4.022ArgSer: 4.022 ± 0.045
4.81ArgThr: 4.81 ± 0.048
5.313ArgVal: 5.313 ± 0.053
1.4ArgTrp: 1.4 ± 0.025
1.75ArgTyr: 1.75 ± 0.027
0.0ArgXaa: 0.0 ± 0.0
Ser
7.019SerAla: 7.019 ± 0.069
0.493SerCys: 0.493 ± 0.015
2.542SerAsp: 2.542 ± 0.033
2.178SerGlu: 2.178 ± 0.033
1.509SerPhe: 1.509 ± 0.027
5.888SerGly: 5.888 ± 0.063
1.056SerHis: 1.056 ± 0.019
1.534SerIle: 1.534 ± 0.024
0.879SerLys: 0.879 ± 0.022
4.763SerLeu: 4.763 ± 0.046
1.073SerMet: 1.073 ± 0.022
1.001SerAsn: 1.001 ± 0.021
3.336SerPro: 3.336 ± 0.042
1.451SerGln: 1.451 ± 0.025
3.482SerArg: 3.482 ± 0.038
3.113SerSer: 3.113 ± 0.044
3.247SerThr: 3.247 ± 0.044
4.032SerVal: 4.032 ± 0.037
0.995SerTrp: 0.995 ± 0.022
1.256SerTyr: 1.256 ± 0.024
0.0SerXaa: 0.0 ± 0.0
Thr
9.609ThrAla: 9.609 ± 0.079
0.411ThrCys: 0.411 ± 0.015
3.483ThrAsp: 3.483 ± 0.045
3.206ThrGlu: 3.206 ± 0.045
1.472ThrPhe: 1.472 ± 0.026
6.854ThrGly: 6.854 ± 0.06
1.113ThrHis: 1.113 ± 0.022
1.76ThrIle: 1.76 ± 0.035
0.975ThrLys: 0.975 ± 0.026
5.677ThrLeu: 5.677 ± 0.047
0.923ThrMet: 0.923 ± 0.021
1.1ThrAsn: 1.1 ± 0.024
4.093ThrPro: 4.093 ± 0.052
1.436ThrGln: 1.436 ± 0.028
3.561ThrArg: 3.561 ± 0.042
3.128ThrSer: 3.128 ± 0.041
3.809ThrThr: 3.809 ± 0.049
6.063ThrVal: 6.063 ± 0.057
0.793ThrTrp: 0.793 ± 0.02
1.061ThrTyr: 1.061 ± 0.023
0.0ThrXaa: 0.0 ± 0.0
Val
10.834ValAla: 10.834 ± 0.085
0.684ValCys: 0.684 ± 0.019
4.646ValAsp: 4.646 ± 0.046
4.383ValGlu: 4.383 ± 0.055
2.307ValPhe: 2.307 ± 0.035
6.391ValGly: 6.391 ± 0.058
1.886ValHis: 1.886 ± 0.03
2.825ValIle: 2.825 ± 0.037
1.465ValLys: 1.465 ± 0.027
9.956ValLeu: 9.956 ± 0.089
1.258ValMet: 1.258 ± 0.024
1.723ValAsn: 1.723 ± 0.034
5.132ValPro: 5.132 ± 0.048
2.265ValGln: 2.265 ± 0.034
6.415ValArg: 6.415 ± 0.06
4.227ValSer: 4.227 ± 0.049
5.224ValThr: 5.224 ± 0.056
7.431ValVal: 7.431 ± 0.07
1.039ValTrp: 1.039 ± 0.021
1.423ValTyr: 1.423 ± 0.026
0.0ValXaa: 0.0 ± 0.0
Trp
1.683TrpAla: 1.683 ± 0.024
0.177TrpCys: 0.177 ± 0.009
0.762TrpAsp: 0.762 ± 0.018
0.739TrpGlu: 0.739 ± 0.02
0.478TrpPhe: 0.478 ± 0.016
1.079TrpGly: 1.079 ± 0.023
0.396TrpHis: 0.396 ± 0.015
0.492TrpIle: 0.492 ± 0.013
0.274TrpLys: 0.274 ± 0.01
1.957TrpLeu: 1.957 ± 0.034
0.262TrpMet: 0.262 ± 0.011
0.382TrpAsn: 0.382 ± 0.014
0.858TrpPro: 0.858 ± 0.017
0.783TrpGln: 0.783 ± 0.019
1.37TrpArg: 1.37 ± 0.025
1.008TrpSer: 1.008 ± 0.02
0.985TrpThr: 0.985 ± 0.022
1.005TrpVal: 1.005 ± 0.021
0.349TrpTrp: 0.349 ± 0.015
0.359TrpTyr: 0.359 ± 0.013
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.489TyrAla: 2.489 ± 0.029
0.191TyrCys: 0.191 ± 0.009
1.256TyrAsp: 1.256 ± 0.024
0.94TyrGlu: 0.94 ± 0.025
0.62TyrPhe: 0.62 ± 0.017
2.066TyrGly: 2.066 ± 0.033
0.421TyrHis: 0.421 ± 0.014
0.443TyrIle: 0.443 ± 0.014
0.293TyrLys: 0.293 ± 0.012
2.33TyrLeu: 2.33 ± 0.034
0.224TyrMet: 0.224 ± 0.011
0.405TyrAsn: 0.405 ± 0.014
1.187TyrPro: 1.187 ± 0.023
0.863TyrGln: 0.863 ± 0.023
1.871TyrArg: 1.871 ± 0.03
0.964TyrSer: 0.964 ± 0.022
1.119TyrThr: 1.119 ± 0.023
1.398TyrVal: 1.398 ± 0.023
0.382TyrTrp: 0.382 ± 0.014
0.452TyrTyr: 0.452 ± 0.016
0.0TyrXaa: 0.0 ± 0.0
Xaa
0.0XaaAla: 0.0 ± 0.0
0.0XaaCys: 0.0 ± 0.0
0.0XaaAsp: 0.0 ± 0.0
0.0XaaGlu: 0.0 ± 0.0
0.0XaaPhe: 0.0 ± 0.0
0.0XaaGly: 0.0 ± 0.0
0.0XaaHis: 0.0 ± 0.0
0.0XaaIle: 0.0 ± 0.0
0.0XaaLys: 0.0 ± 0.0
0.0XaaLeu: 0.0 ± 0.0
0.0XaaMet: 0.0 ± 0.0
0.0XaaAsn: 0.0 ± 0.0
0.0XaaPro: 0.0 ± 0.0
0.0XaaGln: 0.0 ± 0.0
0.0XaaArg: 0.0 ± 0.0
0.0XaaSer: 0.0 ± 0.0
0.0XaaThr: 0.0 ± 0.0
0.0XaaVal: 0.0 ± 0.0
0.0XaaTrp: 0.0 ± 0.0
0.0XaaTyr: 0.0 ± 0.0
0.0XaaXaa: 0.0 ± 0.0
Statistics based on 7642 proteins (2550680 amino acids)

Note: The error has been estimated with the bootstraping (x100) at the protein level

Above dipeptide statistics (among other stats for this proteome) you can download from this CSV file
See this proteome in: uniprot_link
Proteome-pI is available under Creative Commons Attribution-NoDerivs license, for more details see here

Reference: Kozlowski LP. Proteome-pI 2.0: Proteome Isoelectric Point Database Update. Nucleic Acids Res. 2021, doi: 10.1093/nar/gkab944 Contact: Lukasz P. Kozlowski