Amino acid dipepetide frequency for Streptomyces sp. BK239

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
21.786AlaAla: 21.786 ± 0.179
1.083AlaCys: 1.083 ± 0.026
8.42AlaAsp: 8.42 ± 0.081
8.963AlaGlu: 8.963 ± 0.118
3.501AlaPhe: 3.501 ± 0.052
13.438AlaGly: 13.438 ± 0.11
2.969AlaHis: 2.969 ± 0.04
3.239AlaIle: 3.239 ± 0.047
3.118AlaLys: 3.118 ± 0.06
14.526AlaLeu: 14.526 ± 0.104
2.398AlaMet: 2.398 ± 0.04
1.938AlaAsn: 1.938 ± 0.038
7.553AlaPro: 7.553 ± 0.108
3.926AlaGln: 3.926 ± 0.062
10.852AlaArg: 10.852 ± 0.087
6.222AlaSer: 6.222 ± 0.07
6.903AlaThr: 6.903 ± 0.075
12.562AlaVal: 12.562 ± 0.107
1.879AlaTrp: 1.879 ± 0.038
2.825AlaTyr: 2.825 ± 0.042
0.0AlaXaa: 0.0 ± 0.0
Cys
1.089CysAla: 1.089 ± 0.025
0.09CysCys: 0.09 ± 0.008
0.468CysAsp: 0.468 ± 0.015
0.404CysGlu: 0.404 ± 0.015
0.223CysPhe: 0.223 ± 0.012
0.951CysGly: 0.951 ± 0.023
0.198CysHis: 0.198 ± 0.011
0.134CysIle: 0.134 ± 0.009
0.114CysLys: 0.114 ± 0.007
0.742CysLeu: 0.742 ± 0.02
0.12CysMet: 0.12 ± 0.008
0.117CysAsn: 0.117 ± 0.008
0.482CysPro: 0.482 ± 0.018
0.17CysGln: 0.17 ± 0.01
0.59CysArg: 0.59 ± 0.018
0.416CysSer: 0.416 ± 0.016
0.494CysThr: 0.494 ± 0.019
0.672CysVal: 0.672 ± 0.02
0.117CysTrp: 0.117 ± 0.008
0.134CysTyr: 0.134 ± 0.009
0.0CysXaa: 0.0 ± 0.0
Asp
8.062AspAla: 8.062 ± 0.073
0.436AspCys: 0.436 ± 0.016
3.775AspAsp: 3.775 ± 0.051
3.896AspGlu: 3.896 ± 0.052
1.626AspPhe: 1.626 ± 0.031
6.44AspGly: 6.44 ± 0.064
1.413AspHis: 1.413 ± 0.03
1.719AspIle: 1.719 ± 0.037
1.331AspLys: 1.331 ± 0.032
6.128AspLeu: 6.128 ± 0.062
0.808AspMet: 0.808 ± 0.02
0.947AspAsn: 0.947 ± 0.025
4.5AspPro: 4.5 ± 0.05
1.5AspGln: 1.5 ± 0.03
4.852AspArg: 4.852 ± 0.07
2.465AspSer: 2.465 ± 0.042
3.127AspThr: 3.127 ± 0.047
4.849AspVal: 4.849 ± 0.056
1.006AspTrp: 1.006 ± 0.025
1.064AspTyr: 1.064 ± 0.026
0.0AspXaa: 0.0 ± 0.0
Glu
7.763GluAla: 7.763 ± 0.105
0.349GluCys: 0.349 ± 0.015
2.927GluAsp: 2.927 ± 0.044
3.715GluGlu: 3.715 ± 0.056
1.426GluPhe: 1.426 ± 0.03
4.555GluGly: 4.555 ± 0.059
1.511GluHis: 1.511 ± 0.033
2.243GluIle: 2.243 ± 0.043
1.523GluLys: 1.523 ± 0.036
6.708GluLeu: 6.708 ± 0.075
0.87GluMet: 0.87 ± 0.019
1.049GluAsn: 1.049 ± 0.026
3.473GluPro: 3.473 ± 0.056
2.251GluGln: 2.251 ± 0.037
5.604GluArg: 5.604 ± 0.071
2.547GluSer: 2.547 ± 0.039
2.934GluThr: 2.934 ± 0.04
4.512GluVal: 4.512 ± 0.056
0.762GluTrp: 0.762 ± 0.02
1.149GluTyr: 1.149 ± 0.025
0.0GluXaa: 0.0 ± 0.0
Phe
3.644PheAla: 3.644 ± 0.046
0.255PheCys: 0.255 ± 0.01
1.866PheAsp: 1.866 ± 0.039
1.369PheGlu: 1.369 ± 0.027
0.838PhePhe: 0.838 ± 0.023
2.932PheGly: 2.932 ± 0.052
0.595PheHis: 0.595 ± 0.019
0.644PheIle: 0.644 ± 0.019
0.55PheLys: 0.55 ± 0.017
2.582PheLeu: 2.582 ± 0.041
0.394PheMet: 0.394 ± 0.015
0.545PheAsn: 0.545 ± 0.019
1.38PhePro: 1.38 ± 0.031
0.664PheGln: 0.664 ± 0.019
1.836PheArg: 1.836 ± 0.033
1.454PheSer: 1.454 ± 0.028
1.94PheThr: 1.94 ± 0.039
2.228PheVal: 2.228 ± 0.033
0.398PheTrp: 0.398 ± 0.014
0.548PheTyr: 0.548 ± 0.02
0.0PheXaa: 0.0 ± 0.0
Gly
11.656GlyAla: 11.656 ± 0.106
0.818GlyCys: 0.818 ± 0.022
5.297GlyAsp: 5.297 ± 0.071
5.377GlyGlu: 5.377 ± 0.06
2.896GlyPhe: 2.896 ± 0.047
9.306GlyGly: 9.306 ± 0.114
2.292GlyHis: 2.292 ± 0.038
3.127GlyIle: 3.127 ± 0.047
2.512GlyLys: 2.512 ± 0.047
9.294GlyLeu: 9.294 ± 0.088
1.932GlyMet: 1.932 ± 0.034
1.698GlyAsn: 1.698 ± 0.04
5.274GlyPro: 5.274 ± 0.07
2.658GlyGln: 2.658 ± 0.047
7.983GlyArg: 7.983 ± 0.081
5.365GlySer: 5.365 ± 0.06
5.903GlyThr: 5.903 ± 0.071
7.919GlyVal: 7.919 ± 0.077
1.707GlyTrp: 1.707 ± 0.037
2.224GlyTyr: 2.224 ± 0.044
0.0GlyXaa: 0.0 ± 0.0
His
2.742HisAla: 2.742 ± 0.039
0.211HisCys: 0.211 ± 0.011
1.383HisAsp: 1.383 ± 0.031
1.25HisGlu: 1.25 ± 0.028
0.618HisPhe: 0.618 ± 0.019
2.451HisGly: 2.451 ± 0.039
0.663HisHis: 0.663 ± 0.022
0.652HisIle: 0.652 ± 0.017
0.385HisLys: 0.385 ± 0.015
2.308HisLeu: 2.308 ± 0.038
0.308HisMet: 0.308 ± 0.014
0.358HisAsn: 0.358 ± 0.015
1.783HisPro: 1.783 ± 0.033
0.623HisGln: 0.623 ± 0.021
2.099HisArg: 2.099 ± 0.035
0.986HisSer: 0.986 ± 0.028
1.403HisThr: 1.403 ± 0.029
1.751HisVal: 1.751 ± 0.032
0.373HisTrp: 0.373 ± 0.016
0.456HisTyr: 0.456 ± 0.016
0.0HisXaa: 0.0 ± 0.0
Ile
4.506IleAla: 4.506 ± 0.06
0.253IleCys: 0.253 ± 0.012
2.052IleAsp: 2.052 ± 0.039
1.867IleGlu: 1.867 ± 0.039
0.615IlePhe: 0.615 ± 0.019
3.241IleGly: 3.241 ± 0.052
0.561IleHis: 0.561 ± 0.02
0.782IleIle: 0.782 ± 0.024
0.713IleLys: 0.713 ± 0.028
2.332IleLeu: 2.332 ± 0.039
0.431IleMet: 0.431 ± 0.016
0.621IleAsn: 0.621 ± 0.02
1.695IlePro: 1.695 ± 0.035
0.701IleGln: 0.701 ± 0.023
2.103IleArg: 2.103 ± 0.036
1.501IleSer: 1.501 ± 0.03
2.089IleThr: 2.089 ± 0.034
2.724IleVal: 2.724 ± 0.038
0.324IleTrp: 0.324 ± 0.012
0.483IleTyr: 0.483 ± 0.015
0.0IleXaa: 0.0 ± 0.0
Lys
3.242LysAla: 3.242 ± 0.048
0.12LysCys: 0.12 ± 0.009
1.423LysAsp: 1.423 ± 0.032
1.265LysGlu: 1.265 ± 0.029
0.44LysPhe: 0.44 ± 0.017
1.961LysGly: 1.961 ± 0.037
0.45LysHis: 0.45 ± 0.016
0.916LysIle: 0.916 ± 0.026
0.974LysLys: 0.974 ± 0.034
2.083LysLeu: 2.083 ± 0.038
0.417LysMet: 0.417 ± 0.018
0.556LysAsn: 0.556 ± 0.02
1.455LysPro: 1.455 ± 0.038
0.735LysGln: 0.735 ± 0.023
1.543LysArg: 1.543 ± 0.036
1.231LysSer: 1.231 ± 0.029
1.353LysThr: 1.353 ± 0.037
1.97LysVal: 1.97 ± 0.035
0.28LysTrp: 0.28 ± 0.013
0.47LysTyr: 0.47 ± 0.018
0.0LysXaa: 0.0 ± 0.0
Leu
14.891LeuAla: 14.891 ± 0.114
0.827LeuCys: 0.827 ± 0.02
6.606LeuAsp: 6.606 ± 0.069
4.696LeuGlu: 4.696 ± 0.058
2.5LeuPhe: 2.5 ± 0.043
9.05LeuGly: 9.05 ± 0.076
2.269LeuHis: 2.269 ± 0.038
3.065LeuIle: 3.065 ± 0.049
2.179LeuLys: 2.179 ± 0.035
11.108LeuLeu: 11.108 ± 0.106
1.6LeuMet: 1.6 ± 0.029
1.631LeuAsn: 1.631 ± 0.034
6.514LeuPro: 6.514 ± 0.072
2.161LeuGln: 2.161 ± 0.037
8.512LeuArg: 8.512 ± 0.096
5.204LeuSer: 5.204 ± 0.056
6.945LeuThr: 6.945 ± 0.06
8.804LeuVal: 8.804 ± 0.084
1.302LeuTrp: 1.302 ± 0.029
1.821LeuTyr: 1.821 ± 0.036
0.0LeuXaa: 0.0 ± 0.0
Met
2.202MetAla: 2.202 ± 0.036
0.141MetCys: 0.141 ± 0.009
0.867MetAsp: 0.867 ± 0.023
0.75MetGlu: 0.75 ± 0.02
0.452MetPhe: 0.452 ± 0.017
1.309MetGly: 1.309 ± 0.032
0.334MetHis: 0.334 ± 0.014
0.666MetIle: 0.666 ± 0.018
0.415MetLys: 0.415 ± 0.016
1.568MetLeu: 1.568 ± 0.032
0.275MetMet: 0.275 ± 0.013
0.435MetAsn: 0.435 ± 0.015
1.122MetPro: 1.122 ± 0.024
0.43MetGln: 0.43 ± 0.015
1.433MetArg: 1.433 ± 0.027
1.334MetSer: 1.334 ± 0.029
1.543MetThr: 1.543 ± 0.031
1.217MetVal: 1.217 ± 0.027
0.202MetTrp: 0.202 ± 0.01
0.294MetTyr: 0.294 ± 0.013
0.0MetXaa: 0.0 ± 0.0
Asn
2.233AsnAla: 2.233 ± 0.036
0.148AsnCys: 0.148 ± 0.01
0.914AsnAsp: 0.914 ± 0.022
0.833AsnGlu: 0.833 ± 0.021
0.465AsnPhe: 0.465 ± 0.018
1.867AsnGly: 1.867 ± 0.046
0.385AsnHis: 0.385 ± 0.014
0.6AsnIle: 0.6 ± 0.019
0.441AsnLys: 0.441 ± 0.018
1.585AsnLeu: 1.585 ± 0.03
0.32AsnMet: 0.32 ± 0.012
0.42AsnAsn: 0.42 ± 0.019
1.308AsnPro: 1.308 ± 0.029
0.523AsnGln: 0.523 ± 0.02
1.209AsnArg: 1.209 ± 0.026
0.908AsnSer: 0.908 ± 0.026
1.073AsnThr: 1.073 ± 0.026
1.418AsnVal: 1.418 ± 0.029
0.28AsnTrp: 0.28 ± 0.012
0.386AsnTyr: 0.386 ± 0.016
0.0AsnXaa: 0.0 ± 0.0
Pro
9.222ProAla: 9.222 ± 0.112
0.349ProCys: 0.349 ± 0.013
4.381ProAsp: 4.381 ± 0.054
4.463ProGlu: 4.463 ± 0.055
1.523ProPhe: 1.523 ± 0.03
6.775ProGly: 6.775 ± 0.088
1.457ProHis: 1.457 ± 0.033
1.147ProIle: 1.147 ± 0.028
1.202ProLys: 1.202 ± 0.032
5.419ProLeu: 5.419 ± 0.07
0.956ProMet: 0.956 ± 0.023
0.9ProAsn: 0.9 ± 0.023
3.85ProPro: 3.85 ± 0.081
1.896ProGln: 1.896 ± 0.048
4.106ProArg: 4.106 ± 0.057
3.38ProSer: 3.38 ± 0.052
3.221ProThr: 3.221 ± 0.054
5.503ProVal: 5.503 ± 0.068
0.868ProTrp: 0.868 ± 0.023
1.443ProTyr: 1.443 ± 0.034
0.0ProXaa: 0.0 ± 0.0
Gln
3.777GlnAla: 3.777 ± 0.056
0.161GlnCys: 0.161 ± 0.01
1.442GlnAsp: 1.442 ± 0.032
1.481GlnGlu: 1.481 ± 0.03
0.658GlnPhe: 0.658 ± 0.019
2.397GlnGly: 2.397 ± 0.041
0.636GlnHis: 0.636 ± 0.019
1.025GlnIle: 1.025 ± 0.028
0.677GlnLys: 0.677 ± 0.021
2.923GlnLeu: 2.923 ± 0.045
0.495GlnMet: 0.495 ± 0.017
0.512GlnAsn: 0.512 ± 0.023
1.757GlnPro: 1.757 ± 0.053
1.276GlnGln: 1.276 ± 0.042
2.379GlnArg: 2.379 ± 0.038
1.258GlnSer: 1.258 ± 0.027
1.401GlnThr: 1.401 ± 0.032
2.363GlnVal: 2.363 ± 0.041
0.451GlnTrp: 0.451 ± 0.016
0.593GlnTyr: 0.593 ± 0.019
0.0GlnXaa: 0.0 ± 0.0
Arg
10.004ArgAla: 10.004 ± 0.103
0.579ArgCys: 0.579 ± 0.017
4.291ArgAsp: 4.291 ± 0.059
5.058ArgGlu: 5.058 ± 0.071
2.342ArgPhe: 2.342 ± 0.035
6.04ArgGly: 6.04 ± 0.067
2.115ArgHis: 2.115 ± 0.04
3.004ArgIle: 3.004 ± 0.047
1.792ArgLys: 1.792 ± 0.038
8.998ArgLeu: 8.998 ± 0.085
1.738ArgMet: 1.738 ± 0.032
1.313ArgAsn: 1.313 ± 0.029
5.237ArgPro: 5.237 ± 0.068
2.336ArgGln: 2.336 ± 0.04
8.067ArgArg: 8.067 ± 0.105
3.968ArgSer: 3.968 ± 0.051
5.435ArgThr: 5.435 ± 0.058
6.028ArgVal: 6.028 ± 0.064
1.367ArgTrp: 1.367 ± 0.033
1.758ArgTyr: 1.758 ± 0.034
0.0ArgXaa: 0.0 ± 0.0
Ser
6.92SerAla: 6.92 ± 0.079
0.395SerCys: 0.395 ± 0.016
2.735SerAsp: 2.735 ± 0.047
2.418SerGlu: 2.418 ± 0.042
1.47SerPhe: 1.47 ± 0.031
5.995SerGly: 5.995 ± 0.074
1.038SerHis: 1.038 ± 0.026
1.31SerIle: 1.31 ± 0.027
1.057SerLys: 1.057 ± 0.029
4.772SerLeu: 4.772 ± 0.049
1.037SerMet: 1.037 ± 0.021
0.856SerAsn: 0.856 ± 0.023
3.267SerPro: 3.267 ± 0.044
1.256SerGln: 1.256 ± 0.028
3.725SerArg: 3.725 ± 0.049
2.838SerSer: 2.838 ± 0.052
3.011SerThr: 3.011 ± 0.049
4.291SerVal: 4.291 ± 0.051
0.847SerTrp: 0.847 ± 0.021
1.22SerTyr: 1.22 ± 0.026
0.0SerXaa: 0.0 ± 0.0
Thr
9.148ThrAla: 9.148 ± 0.083
0.407ThrCys: 0.407 ± 0.016
3.552ThrAsp: 3.552 ± 0.05
3.154ThrGlu: 3.154 ± 0.039
1.54ThrPhe: 1.54 ± 0.033
6.584ThrGly: 6.584 ± 0.069
1.187ThrHis: 1.187 ± 0.029
1.554ThrIle: 1.554 ± 0.036
1.177ThrLys: 1.177 ± 0.031
5.495ThrLeu: 5.495 ± 0.061
0.92ThrMet: 0.92 ± 0.025
0.935ThrAsn: 0.935 ± 0.024
4.364ThrPro: 4.364 ± 0.057
1.3ThrGln: 1.3 ± 0.027
3.993ThrArg: 3.993 ± 0.044
3.112ThrSer: 3.112 ± 0.054
3.744ThrThr: 3.744 ± 0.068
6.06ThrVal: 6.06 ± 0.057
0.866ThrTrp: 0.866 ± 0.024
1.313ThrTyr: 1.313 ± 0.035
0.0ThrXaa: 0.0 ± 0.0
Val
10.722ValAla: 10.722 ± 0.096
0.777ValCys: 0.777 ± 0.022
5.187ValAsp: 5.187 ± 0.058
4.92ValGlu: 4.92 ± 0.054
2.409ValPhe: 2.409 ± 0.04
6.589ValGly: 6.589 ± 0.064
2.014ValHis: 2.014 ± 0.035
2.738ValIle: 2.738 ± 0.043
1.919ValLys: 1.919 ± 0.034
9.372ValLeu: 9.372 ± 0.092
1.427ValMet: 1.427 ± 0.029
1.694ValAsn: 1.694 ± 0.038
5.251ValPro: 5.251 ± 0.06
2.114ValGln: 2.114 ± 0.037
7.517ValArg: 7.517 ± 0.073
4.386ValSer: 4.386 ± 0.057
5.692ValThr: 5.692 ± 0.065
8.208ValVal: 8.208 ± 0.089
1.175ValTrp: 1.175 ± 0.026
1.6ValTyr: 1.6 ± 0.036
0.0ValXaa: 0.0 ± 0.0
Trp
1.723TrpAla: 1.723 ± 0.035
0.155TrpCys: 0.155 ± 0.01
0.782TrpAsp: 0.782 ± 0.024
0.73TrpGlu: 0.73 ± 0.021
0.49TrpPhe: 0.49 ± 0.016
1.025TrpGly: 1.025 ± 0.022
0.36TrpHis: 0.36 ± 0.017
0.547TrpIle: 0.547 ± 0.016
0.376TrpLys: 0.376 ± 0.018
1.746TrpLeu: 1.746 ± 0.036
0.278TrpMet: 0.278 ± 0.013
0.4TrpAsn: 0.4 ± 0.016
0.757TrpPro: 0.757 ± 0.022
0.587TrpGln: 0.587 ± 0.02
1.313TrpArg: 1.313 ± 0.031
0.942TrpSer: 0.942 ± 0.026
1.052TrpThr: 1.052 ± 0.028
0.927TrpVal: 0.927 ± 0.025
0.342TrpTrp: 0.342 ± 0.016
0.338TrpTyr: 0.338 ± 0.016
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.771TyrAla: 2.771 ± 0.042
0.172TyrCys: 0.172 ± 0.01
1.577TyrAsp: 1.577 ± 0.039
1.265TyrGlu: 1.265 ± 0.026
0.629TyrPhe: 0.629 ± 0.019
2.332TyrGly: 2.332 ± 0.044
0.357TyrHis: 0.357 ± 0.015
0.482TyrIle: 0.482 ± 0.017
0.428TyrLys: 0.428 ± 0.018
2.0TyrLeu: 2.0 ± 0.034
0.265TyrMet: 0.265 ± 0.012
0.393TyrAsn: 0.393 ± 0.018
1.037TyrPro: 1.037 ± 0.026
0.552TyrGln: 0.552 ± 0.018
1.751TyrArg: 1.751 ± 0.033
0.941TyrSer: 0.941 ± 0.021
1.14TyrThr: 1.14 ± 0.028
1.705TyrVal: 1.705 ± 0.031
0.324TyrTrp: 0.324 ± 0.014
0.434TyrTyr: 0.434 ± 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 5360 proteins (1794248 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