Amino acid dipepetide frequency for Robinsoniella sp. RHS

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
7.123AlaAla: 7.123 ± 0.088
0.996AlaCys: 0.996 ± 0.029
4.358AlaAsp: 4.358 ± 0.062
4.858AlaGlu: 4.858 ± 0.061
3.06AlaPhe: 3.06 ± 0.049
6.137AlaGly: 6.137 ± 0.074
0.928AlaHis: 0.928 ± 0.022
4.711AlaIle: 4.711 ± 0.054
4.733AlaLys: 4.733 ± 0.055
6.363AlaLeu: 6.363 ± 0.064
2.216AlaMet: 2.216 ± 0.035
2.676AlaAsn: 2.676 ± 0.041
1.913AlaPro: 1.913 ± 0.034
2.208AlaGln: 2.208 ± 0.04
2.443AlaArg: 2.443 ± 0.037
4.054AlaSer: 4.054 ± 0.052
2.901AlaThr: 2.901 ± 0.06
6.103AlaVal: 6.103 ± 0.071
0.648AlaTrp: 0.648 ± 0.019
2.76AlaTyr: 2.76 ± 0.035
0.0AlaXaa: 0.0 ± 0.0
Cys
0.829CysAla: 0.829 ± 0.02
0.283CysCys: 0.283 ± 0.012
0.761CysAsp: 0.761 ± 0.022
0.896CysGlu: 0.896 ± 0.023
0.663CysPhe: 0.663 ± 0.019
1.284CysGly: 1.284 ± 0.026
0.279CysHis: 0.279 ± 0.012
1.194CysIle: 1.194 ± 0.026
0.889CysLys: 0.889 ± 0.021
1.156CysLeu: 1.156 ± 0.026
0.469CysMet: 0.469 ± 0.015
0.605CysAsn: 0.605 ± 0.017
0.532CysPro: 0.532 ± 0.02
0.432CysGln: 0.432 ± 0.013
0.705CysArg: 0.705 ± 0.022
0.943CysSer: 0.943 ± 0.023
0.73CysThr: 0.73 ± 0.02
0.846CysVal: 0.846 ± 0.021
0.141CysTrp: 0.141 ± 0.008
0.575CysTyr: 0.575 ± 0.017
0.0CysXaa: 0.0 ± 0.0
Asp
3.799AspAla: 3.799 ± 0.049
0.758AspCys: 0.758 ± 0.022
2.746AspAsp: 2.746 ± 0.045
4.126AspGlu: 4.126 ± 0.05
2.595AspPhe: 2.595 ± 0.034
4.346AspGly: 4.346 ± 0.06
0.91AspHis: 0.91 ± 0.021
4.632AspIle: 4.632 ± 0.054
3.652AspLys: 3.652 ± 0.043
4.514AspLeu: 4.514 ± 0.054
1.833AspMet: 1.833 ± 0.035
2.404AspAsn: 2.404 ± 0.043
1.807AspPro: 1.807 ± 0.035
1.76AspGln: 1.76 ± 0.035
2.142AspArg: 2.142 ± 0.035
3.143AspSer: 3.143 ± 0.043
3.104AspThr: 3.104 ± 0.044
3.5AspVal: 3.5 ± 0.044
0.693AspTrp: 0.693 ± 0.018
2.877AspTyr: 2.877 ± 0.039
0.0AspXaa: 0.0 ± 0.0
Glu
5.296GluAla: 5.296 ± 0.065
0.784GluCys: 0.784 ± 0.024
4.06GluAsp: 4.06 ± 0.049
6.62GluGlu: 6.62 ± 0.077
2.715GluPhe: 2.715 ± 0.037
4.333GluGly: 4.333 ± 0.056
1.22GluHis: 1.22 ± 0.029
5.699GluIle: 5.699 ± 0.057
6.373GluLys: 6.373 ± 0.067
6.233GluLeu: 6.233 ± 0.063
2.412GluMet: 2.412 ± 0.035
4.351GluAsn: 4.351 ± 0.049
1.844GluPro: 1.844 ± 0.029
2.689GluGln: 2.689 ± 0.047
2.742GluArg: 2.742 ± 0.043
3.724GluSer: 3.724 ± 0.047
3.776GluThr: 3.776 ± 0.054
4.383GluVal: 4.383 ± 0.061
0.728GluTrp: 0.728 ± 0.021
2.991GluTyr: 2.991 ± 0.039
0.0GluXaa: 0.0 ± 0.0
Phe
2.908PheAla: 2.908 ± 0.046
0.72PheCys: 0.72 ± 0.018
2.408PheAsp: 2.408 ± 0.035
2.676PheGlu: 2.676 ± 0.037
1.955PhePhe: 1.955 ± 0.047
2.994PheGly: 2.994 ± 0.046
0.843PheHis: 0.843 ± 0.021
3.18PheIle: 3.18 ± 0.056
2.377PheLys: 2.377 ± 0.039
4.029PheLeu: 4.029 ± 0.063
1.281PheMet: 1.281 ± 0.028
1.769PheAsn: 1.769 ± 0.031
1.401PhePro: 1.401 ± 0.03
1.665PheGln: 1.665 ± 0.03
1.716PheArg: 1.716 ± 0.031
2.996PheSer: 2.996 ± 0.044
2.679PheThr: 2.679 ± 0.043
2.644PheVal: 2.644 ± 0.041
0.473PheTrp: 0.473 ± 0.016
1.966PheTyr: 1.966 ± 0.036
0.0PheXaa: 0.0 ± 0.0
Gly
4.769GlyAla: 4.769 ± 0.073
1.246GlyCys: 1.246 ± 0.028
3.519GlyAsp: 3.519 ± 0.049
4.702GlyGlu: 4.702 ± 0.048
3.212GlyPhe: 3.212 ± 0.045
4.946GlyGly: 4.946 ± 0.082
1.111GlyHis: 1.111 ± 0.026
6.645GlyIle: 6.645 ± 0.075
5.603GlyLys: 5.603 ± 0.059
5.75GlyLeu: 5.75 ± 0.062
2.496GlyMet: 2.496 ± 0.041
3.575GlyAsn: 3.575 ± 0.057
1.282GlyPro: 1.282 ± 0.036
2.097GlyGln: 2.097 ± 0.039
2.733GlyArg: 2.733 ± 0.039
4.487GlySer: 4.487 ± 0.06
4.229GlyThr: 4.229 ± 0.063
4.704GlyVal: 4.704 ± 0.046
0.833GlyTrp: 0.833 ± 0.028
3.411GlyTyr: 3.411 ± 0.045
0.0GlyXaa: 0.0 ± 0.0
His
0.983HisAla: 0.983 ± 0.026
0.296HisCys: 0.296 ± 0.012
0.835HisAsp: 0.835 ± 0.021
0.97HisGlu: 0.97 ± 0.023
0.921HisPhe: 0.921 ± 0.023
1.167HisGly: 1.167 ± 0.026
0.389HisHis: 0.389 ± 0.014
1.405HisIle: 1.405 ± 0.029
0.95HisLys: 0.95 ± 0.02
1.527HisLeu: 1.527 ± 0.031
0.535HisMet: 0.535 ± 0.017
0.727HisAsn: 0.727 ± 0.02
0.782HisPro: 0.782 ± 0.019
0.568HisGln: 0.568 ± 0.017
0.663HisArg: 0.663 ± 0.017
0.93HisSer: 0.93 ± 0.022
0.935HisThr: 0.935 ± 0.024
0.982HisVal: 0.982 ± 0.022
0.177HisTrp: 0.177 ± 0.01
0.804HisTyr: 0.804 ± 0.021
0.0HisXaa: 0.0 ± 0.0
Ile
5.477IleAla: 5.477 ± 0.066
1.364IleCys: 1.364 ± 0.029
3.95IleAsp: 3.95 ± 0.048
4.707IleGlu: 4.707 ± 0.044
3.305IlePhe: 3.305 ± 0.058
5.159IleGly: 5.159 ± 0.061
1.4IleHis: 1.4 ± 0.026
5.627IleIle: 5.627 ± 0.073
4.657IleLys: 4.657 ± 0.048
7.607IleLeu: 7.607 ± 0.088
2.23IleMet: 2.23 ± 0.039
3.279IleAsn: 3.279 ± 0.045
3.319IlePro: 3.319 ± 0.044
2.751IleGln: 2.751 ± 0.042
3.483IleArg: 3.483 ± 0.046
5.359IleSer: 5.359 ± 0.058
4.787IleThr: 4.787 ± 0.054
4.655IleVal: 4.655 ± 0.057
0.733IleTrp: 0.733 ± 0.018
3.076IleTyr: 3.076 ± 0.045
0.0IleXaa: 0.0 ± 0.0
Lys
5.021LysAla: 5.021 ± 0.056
0.7LysCys: 0.7 ± 0.02
4.013LysAsp: 4.013 ± 0.05
6.685LysGlu: 6.685 ± 0.083
2.008LysPhe: 2.008 ± 0.034
4.562LysGly: 4.562 ± 0.055
0.935LysHis: 0.935 ± 0.02
5.394LysIle: 5.394 ± 0.054
6.424LysLys: 6.424 ± 0.071
5.351LysLeu: 5.351 ± 0.059
2.383LysMet: 2.383 ± 0.036
4.08LysAsn: 4.08 ± 0.048
2.089LysPro: 2.089 ± 0.038
2.326LysGln: 2.326 ± 0.035
2.837LysArg: 2.837 ± 0.038
3.867LysSer: 3.867 ± 0.047
3.838LysThr: 3.838 ± 0.051
4.528LysVal: 4.528 ± 0.053
0.714LysTrp: 0.714 ± 0.023
2.957LysTyr: 2.957 ± 0.044
0.0LysXaa: 0.0 ± 0.0
Leu
6.168LeuAla: 6.168 ± 0.068
1.442LeuCys: 1.442 ± 0.031
4.94LeuAsp: 4.94 ± 0.048
6.177LeuGlu: 6.177 ± 0.06
3.886LeuPhe: 3.886 ± 0.057
5.71LeuGly: 5.71 ± 0.072
1.48LeuHis: 1.48 ± 0.026
6.141LeuIle: 6.141 ± 0.082
6.533LeuLys: 6.533 ± 0.061
8.245LeuLeu: 8.245 ± 0.107
2.574LeuMet: 2.574 ± 0.036
4.232LeuAsn: 4.232 ± 0.046
3.525LeuPro: 3.525 ± 0.051
3.092LeuGln: 3.092 ± 0.041
3.258LeuArg: 3.258 ± 0.04
6.162LeuSer: 6.162 ± 0.066
5.017LeuThr: 5.017 ± 0.054
5.103LeuVal: 5.103 ± 0.063
0.82LeuTrp: 0.82 ± 0.02
3.512LeuTyr: 3.512 ± 0.046
0.0LeuXaa: 0.0 ± 0.001
Met
2.267MetAla: 2.267 ± 0.037
0.383MetCys: 0.383 ± 0.013
1.932MetAsp: 1.932 ± 0.033
2.678MetGlu: 2.678 ± 0.038
1.043MetPhe: 1.043 ± 0.024
2.183MetGly: 2.183 ± 0.036
0.472MetHis: 0.472 ± 0.014
2.35MetIle: 2.35 ± 0.041
2.736MetLys: 2.736 ± 0.043
2.745MetLeu: 2.745 ± 0.037
0.965MetMet: 0.965 ± 0.025
1.645MetAsn: 1.645 ± 0.028
1.183MetPro: 1.183 ± 0.024
1.198MetGln: 1.198 ± 0.023
1.118MetArg: 1.118 ± 0.023
1.708MetSer: 1.708 ± 0.033
1.655MetThr: 1.655 ± 0.03
2.044MetVal: 2.044 ± 0.036
0.263MetTrp: 0.263 ± 0.011
0.975MetTyr: 0.975 ± 0.023
0.0MetXaa: 0.0 ± 0.0
Asn
3.275AsnAla: 3.275 ± 0.054
0.638AsnCys: 0.638 ± 0.02
2.275AsnAsp: 2.275 ± 0.032
3.033AsnGlu: 3.033 ± 0.04
1.807AsnPhe: 1.807 ± 0.028
3.874AsnGly: 3.874 ± 0.053
0.908AsnHis: 0.908 ± 0.021
3.78AsnIle: 3.78 ± 0.054
3.051AsnLys: 3.051 ± 0.04
3.997AsnLeu: 3.997 ± 0.047
1.568AsnMet: 1.568 ± 0.026
2.17AsnAsn: 2.17 ± 0.051
2.128AsnPro: 2.128 ± 0.031
1.902AsnGln: 1.902 ± 0.036
2.006AsnArg: 2.006 ± 0.034
2.714AsnSer: 2.714 ± 0.042
2.777AsnThr: 2.777 ± 0.046
2.925AsnVal: 2.925 ± 0.045
0.557AsnTrp: 0.557 ± 0.02
2.177AsnTyr: 2.177 ± 0.036
0.0AsnXaa: 0.0 ± 0.0
Pro
2.432ProAla: 2.432 ± 0.033
0.431ProCys: 0.431 ± 0.015
2.418ProAsp: 2.418 ± 0.038
3.076ProGlu: 3.076 ± 0.049
1.562ProPhe: 1.562 ± 0.027
2.437ProGly: 2.437 ± 0.036
0.594ProHis: 0.594 ± 0.019
2.039ProIle: 2.039 ± 0.039
1.834ProLys: 1.834 ± 0.029
2.734ProLeu: 2.734 ± 0.039
0.913ProMet: 0.913 ± 0.019
1.289ProAsn: 1.289 ± 0.026
0.74ProPro: 0.74 ± 0.03
1.103ProGln: 1.103 ± 0.027
0.963ProArg: 0.963 ± 0.024
1.808ProSer: 1.808 ± 0.029
1.465ProThr: 1.465 ± 0.031
3.026ProVal: 3.026 ± 0.041
0.393ProTrp: 0.393 ± 0.014
1.475ProTyr: 1.475 ± 0.029
0.0ProXaa: 0.0 ± 0.0
Gln
2.444GlnAla: 2.444 ± 0.041
0.349GlnCys: 0.349 ± 0.013
1.812GlnAsp: 1.812 ± 0.032
2.888GlnGlu: 2.888 ± 0.047
1.277GlnPhe: 1.277 ± 0.025
2.138GlnGly: 2.138 ± 0.037
0.451GlnHis: 0.451 ± 0.015
2.906GlnIle: 2.906 ± 0.043
2.828GlnLys: 2.828 ± 0.038
2.884GlnLeu: 2.884 ± 0.038
1.246GlnMet: 1.246 ± 0.027
1.94GlnAsn: 1.94 ± 0.03
1.034GlnPro: 1.034 ± 0.023
1.188GlnGln: 1.188 ± 0.028
1.247GlnArg: 1.247 ± 0.029
1.915GlnSer: 1.915 ± 0.031
1.883GlnThr: 1.883 ± 0.033
2.136GlnVal: 2.136 ± 0.035
0.357GlnTrp: 0.357 ± 0.012
1.532GlnTyr: 1.532 ± 0.026
0.0GlnXaa: 0.0 ± 0.0
Arg
2.206ArgAla: 2.206 ± 0.036
0.492ArgCys: 0.492 ± 0.017
2.05ArgAsp: 2.05 ± 0.033
3.348ArgGlu: 3.348 ± 0.047
1.782ArgPhe: 1.782 ± 0.031
2.233ArgGly: 2.233 ± 0.038
0.69ArgHis: 0.69 ± 0.017
3.426ArgIle: 3.426 ± 0.051
3.067ArgLys: 3.067 ± 0.04
3.477ArgLeu: 3.477 ± 0.047
1.399ArgMet: 1.399 ± 0.03
2.026ArgAsn: 2.026 ± 0.034
1.055ArgPro: 1.055 ± 0.028
1.503ArgGln: 1.503 ± 0.027
1.738ArgArg: 1.738 ± 0.035
2.091ArgSer: 2.091 ± 0.03
1.938ArgThr: 1.938 ± 0.033
2.293ArgVal: 2.293 ± 0.033
0.417ArgTrp: 0.417 ± 0.015
1.82ArgTyr: 1.82 ± 0.031
0.0ArgXaa: 0.0 ± 0.0
Ser
4.3SerAla: 4.3 ± 0.055
0.85SerCys: 0.85 ± 0.022
3.387SerAsp: 3.387 ± 0.046
3.895SerGlu: 3.895 ± 0.053
2.962SerPhe: 2.962 ± 0.04
5.207SerGly: 5.207 ± 0.059
1.007SerHis: 1.007 ± 0.022
4.573SerIle: 4.573 ± 0.05
3.736SerLys: 3.736 ± 0.047
5.293SerLeu: 5.293 ± 0.049
1.918SerMet: 1.918 ± 0.03
2.602SerAsn: 2.602 ± 0.041
1.836SerPro: 1.836 ± 0.032
2.067SerGln: 2.067 ± 0.034
2.528SerArg: 2.528 ± 0.042
3.962SerSer: 3.962 ± 0.057
2.926SerThr: 2.926 ± 0.042
4.28SerVal: 4.28 ± 0.05
0.685SerTrp: 0.685 ± 0.019
2.701SerTyr: 2.701 ± 0.039
0.0SerXaa: 0.0 ± 0.0
Thr
4.64ThrAla: 4.64 ± 0.072
0.638ThrCys: 0.638 ± 0.017
3.339ThrAsp: 3.339 ± 0.049
3.755ThrGlu: 3.755 ± 0.055
2.3ThrPhe: 2.3 ± 0.039
4.986ThrGly: 4.986 ± 0.089
0.786ThrHis: 0.786 ± 0.022
4.106ThrIle: 4.106 ± 0.054
3.194ThrLys: 3.194 ± 0.045
4.817ThrLeu: 4.817 ± 0.062
1.436ThrMet: 1.436 ± 0.027
2.228ThrAsn: 2.228 ± 0.042
2.092ThrPro: 2.092 ± 0.03
1.581ThrGln: 1.581 ± 0.029
1.851ThrArg: 1.851 ± 0.034
3.079ThrSer: 3.079 ± 0.047
2.812ThrThr: 2.812 ± 0.045
4.291ThrVal: 4.291 ± 0.057
0.546ThrTrp: 0.546 ± 0.019
2.255ThrTyr: 2.255 ± 0.039
0.0ThrXaa: 0.0 ± 0.0
Val
3.914ValAla: 3.914 ± 0.05
1.081ValCys: 1.081 ± 0.025
3.401ValAsp: 3.401 ± 0.046
4.171ValGlu: 4.171 ± 0.041
3.097ValPhe: 3.097 ± 0.049
3.841ValGly: 3.841 ± 0.049
0.998ValHis: 0.998 ± 0.023
5.353ValIle: 5.353 ± 0.065
4.813ValLys: 4.813 ± 0.059
6.321ValLeu: 6.321 ± 0.071
2.082ValMet: 2.082 ± 0.027
3.201ValAsn: 3.201 ± 0.048
2.404ValPro: 2.404 ± 0.034
2.047ValGln: 2.047 ± 0.032
2.469ValArg: 2.469 ± 0.035
4.57ValSer: 4.57 ± 0.05
4.369ValThr: 4.369 ± 0.067
4.204ValVal: 4.204 ± 0.053
0.683ValTrp: 0.683 ± 0.02
2.678ValTyr: 2.678 ± 0.034
0.0ValXaa: 0.0 ± 0.0
Trp
0.591TrpAla: 0.591 ± 0.018
0.155TrpCys: 0.155 ± 0.009
0.663TrpAsp: 0.663 ± 0.018
0.761TrpGlu: 0.761 ± 0.021
0.452TrpPhe: 0.452 ± 0.015
0.735TrpGly: 0.735 ± 0.018
0.215TrpHis: 0.215 ± 0.01
0.74TrpIle: 0.74 ± 0.021
0.824TrpLys: 0.824 ± 0.022
0.88TrpLeu: 0.88 ± 0.024
0.372TrpMet: 0.372 ± 0.014
0.678TrpAsn: 0.678 ± 0.021
0.271TrpPro: 0.271 ± 0.014
0.416TrpGln: 0.416 ± 0.014
0.348TrpArg: 0.348 ± 0.014
0.655TrpSer: 0.655 ± 0.017
0.496TrpThr: 0.496 ± 0.016
0.584TrpVal: 0.584 ± 0.017
0.139TrpTrp: 0.139 ± 0.01
0.478TrpTyr: 0.478 ± 0.016
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.744TyrAla: 2.744 ± 0.036
0.606TyrCys: 0.606 ± 0.019
2.474TyrAsp: 2.474 ± 0.043
2.952TyrGlu: 2.952 ± 0.041
2.078TyrPhe: 2.078 ± 0.038
3.079TyrGly: 3.079 ± 0.039
0.93TyrHis: 0.93 ± 0.021
3.027TyrIle: 3.027 ± 0.048
2.436TyrLys: 2.436 ± 0.039
4.095TyrLeu: 4.095 ± 0.054
1.215TyrMet: 1.215 ± 0.021
2.085TyrAsn: 2.085 ± 0.038
1.493TyrPro: 1.493 ± 0.03
1.862TyrGln: 1.862 ± 0.031
2.061TyrArg: 2.061 ± 0.037
2.549TyrSer: 2.549 ± 0.038
2.417TyrThr: 2.417 ± 0.042
2.466TyrVal: 2.466 ± 0.034
0.45TyrTrp: 0.45 ± 0.015
2.09TyrTyr: 2.09 ± 0.045
0.0TyrXaa: 0.0 ± 0.0
Xaa
0.0XaaAla: 0.0 ± 0.0
0.0XaaCys: 0.0 ± 0.001
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 6119 proteins (2057799 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