Amino acid dipepetide frequency for Streptomyces sp. SID4931

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
20.738AlaAla: 20.738 ± 0.177
1.005AlaCys: 1.005 ± 0.032
8.259AlaAsp: 8.259 ± 0.079
9.084AlaGlu: 9.084 ± 0.099
3.605AlaPhe: 3.605 ± 0.053
12.701AlaGly: 12.701 ± 0.112
2.688AlaHis: 2.688 ± 0.044
3.65AlaIle: 3.65 ± 0.055
3.154AlaLys: 3.154 ± 0.059
14.438AlaLeu: 14.438 ± 0.128
2.566AlaMet: 2.566 ± 0.038
1.992AlaAsn: 1.992 ± 0.042
6.715AlaPro: 6.715 ± 0.074
3.628AlaGln: 3.628 ± 0.044
9.871AlaArg: 9.871 ± 0.096
6.059AlaSer: 6.059 ± 0.066
6.923AlaThr: 6.923 ± 0.067
12.135AlaVal: 12.135 ± 0.123
1.791AlaTrp: 1.791 ± 0.033
2.839AlaTyr: 2.839 ± 0.043
0.0AlaXaa: 0.0 ± 0.0
Cys
1.046CysAla: 1.046 ± 0.029
0.094CysCys: 0.094 ± 0.008
0.456CysAsp: 0.456 ± 0.019
0.415CysGlu: 0.415 ± 0.016
0.225CysPhe: 0.225 ± 0.013
0.983CysGly: 0.983 ± 0.024
0.181CysHis: 0.181 ± 0.011
0.184CysIle: 0.184 ± 0.012
0.113CysLys: 0.113 ± 0.009
0.701CysLeu: 0.701 ± 0.021
0.127CysMet: 0.127 ± 0.01
0.134CysAsn: 0.134 ± 0.009
0.471CysPro: 0.471 ± 0.02
0.152CysGln: 0.152 ± 0.01
0.571CysArg: 0.571 ± 0.021
0.462CysSer: 0.462 ± 0.02
0.536CysThr: 0.536 ± 0.018
0.664CysVal: 0.664 ± 0.021
0.124CysTrp: 0.124 ± 0.009
0.158CysTyr: 0.158 ± 0.009
0.0CysXaa: 0.0 ± 0.0
Asp
7.862AspAla: 7.862 ± 0.079
0.418AspCys: 0.418 ± 0.019
3.606AspAsp: 3.606 ± 0.073
4.014AspGlu: 4.014 ± 0.056
1.685AspPhe: 1.685 ± 0.03
6.37AspGly: 6.37 ± 0.068
1.447AspHis: 1.447 ± 0.031
2.013AspIle: 2.013 ± 0.04
1.279AspLys: 1.279 ± 0.034
6.132AspLeu: 6.132 ± 0.077
0.836AspMet: 0.836 ± 0.023
1.013AspAsn: 1.013 ± 0.029
4.433AspPro: 4.433 ± 0.053
1.498AspGln: 1.498 ± 0.036
5.127AspArg: 5.127 ± 0.07
2.525AspSer: 2.525 ± 0.047
3.227AspThr: 3.227 ± 0.049
4.638AspVal: 4.638 ± 0.056
0.988AspTrp: 0.988 ± 0.026
1.12AspTyr: 1.12 ± 0.028
0.0AspXaa: 0.0 ± 0.0
Glu
7.652GluAla: 7.652 ± 0.092
0.361GluCys: 0.361 ± 0.017
3.001GluAsp: 3.001 ± 0.047
3.9GluGlu: 3.9 ± 0.069
1.551GluPhe: 1.551 ± 0.035
4.631GluGly: 4.631 ± 0.062
1.5GluHis: 1.5 ± 0.03
2.431GluIle: 2.431 ± 0.04
1.763GluLys: 1.763 ± 0.035
7.089GluLeu: 7.089 ± 0.086
0.911GluMet: 0.911 ± 0.026
1.169GluAsn: 1.169 ± 0.029
3.333GluPro: 3.333 ± 0.051
2.318GluGln: 2.318 ± 0.044
5.54GluArg: 5.54 ± 0.063
2.695GluSer: 2.695 ± 0.046
2.965GluThr: 2.965 ± 0.05
4.536GluVal: 4.536 ± 0.053
0.738GluTrp: 0.738 ± 0.024
1.109GluTyr: 1.109 ± 0.028
0.001GluXaa: 0.001 ± 0.001
Phe
3.782PheAla: 3.782 ± 0.054
0.299PheCys: 0.299 ± 0.015
2.032PheAsp: 2.032 ± 0.038
1.461PheGlu: 1.461 ± 0.03
0.925PhePhe: 0.925 ± 0.026
3.117PheGly: 3.117 ± 0.047
0.57PheHis: 0.57 ± 0.02
0.835PheIle: 0.835 ± 0.025
0.5PheLys: 0.5 ± 0.02
2.708PheLeu: 2.708 ± 0.044
0.423PheMet: 0.423 ± 0.019
0.555PheAsn: 0.555 ± 0.017
1.416PhePro: 1.416 ± 0.034
0.683PheGln: 0.683 ± 0.022
1.848PheArg: 1.848 ± 0.037
1.535PheSer: 1.535 ± 0.033
2.015PheThr: 2.015 ± 0.037
2.266PheVal: 2.266 ± 0.041
0.441PheTrp: 0.441 ± 0.017
0.596PheTyr: 0.596 ± 0.02
0.0PheXaa: 0.0 ± 0.0
Gly
10.801GlyAla: 10.801 ± 0.092
0.865GlyCys: 0.865 ± 0.027
5.27GlyAsp: 5.27 ± 0.061
5.353GlyGlu: 5.353 ± 0.064
2.95GlyPhe: 2.95 ± 0.048
8.697GlyGly: 8.697 ± 0.087
2.224GlyHis: 2.224 ± 0.042
3.649GlyIle: 3.649 ± 0.052
2.687GlyLys: 2.687 ± 0.046
9.552GlyLeu: 9.552 ± 0.097
2.006GlyMet: 2.006 ± 0.041
1.818GlyAsn: 1.818 ± 0.038
5.195GlyPro: 5.195 ± 0.059
2.703GlyGln: 2.703 ± 0.051
7.633GlyArg: 7.633 ± 0.08
5.531GlySer: 5.531 ± 0.067
6.141GlyThr: 6.141 ± 0.062
7.412GlyVal: 7.412 ± 0.082
1.608GlyTrp: 1.608 ± 0.035
2.21GlyTyr: 2.21 ± 0.039
0.0GlyXaa: 0.0 ± 0.0
His
2.491HisAla: 2.491 ± 0.044
0.215HisCys: 0.215 ± 0.013
1.276HisAsp: 1.276 ± 0.033
1.189HisGlu: 1.189 ± 0.032
0.644HisPhe: 0.644 ± 0.018
2.296HisGly: 2.296 ± 0.04
0.657HisHis: 0.657 ± 0.023
0.732HisIle: 0.732 ± 0.024
0.337HisLys: 0.337 ± 0.014
2.41HisLeu: 2.41 ± 0.044
0.331HisMet: 0.331 ± 0.012
0.355HisAsn: 0.355 ± 0.015
1.768HisPro: 1.768 ± 0.037
0.659HisGln: 0.659 ± 0.023
2.122HisArg: 2.122 ± 0.038
0.965HisSer: 0.965 ± 0.028
1.252HisThr: 1.252 ± 0.028
1.605HisVal: 1.605 ± 0.037
0.352HisTrp: 0.352 ± 0.015
0.46HisTyr: 0.46 ± 0.018
0.0HisXaa: 0.0 ± 0.0
Ile
5.118IleAla: 5.118 ± 0.062
0.309IleCys: 0.309 ± 0.012
2.456IleAsp: 2.456 ± 0.04
2.222IleGlu: 2.222 ± 0.04
0.793IlePhe: 0.793 ± 0.024
3.859IleGly: 3.859 ± 0.055
0.617IleHis: 0.617 ± 0.018
0.994IleIle: 0.994 ± 0.027
0.825IleLys: 0.825 ± 0.026
2.616IleLeu: 2.616 ± 0.048
0.487IleMet: 0.487 ± 0.019
0.775IleAsn: 0.775 ± 0.023
1.817IlePro: 1.817 ± 0.037
0.788IleGln: 0.788 ± 0.026
2.255IleArg: 2.255 ± 0.042
1.769IleSer: 1.769 ± 0.034
2.346IleThr: 2.346 ± 0.042
2.924IleVal: 2.924 ± 0.048
0.411IleTrp: 0.411 ± 0.016
0.58IleTyr: 0.58 ± 0.02
0.0IleXaa: 0.0 ± 0.0
Lys
3.141LysAla: 3.141 ± 0.05
0.105LysCys: 0.105 ± 0.008
1.518LysAsp: 1.518 ± 0.037
1.425LysGlu: 1.425 ± 0.037
0.523LysPhe: 0.523 ± 0.02
1.921LysGly: 1.921 ± 0.044
0.472LysHis: 0.472 ± 0.016
0.99LysIle: 0.99 ± 0.031
1.118LysLys: 1.118 ± 0.036
2.281LysLeu: 2.281 ± 0.042
0.437LysMet: 0.437 ± 0.017
0.608LysAsn: 0.608 ± 0.024
1.481LysPro: 1.481 ± 0.037
0.758LysGln: 0.758 ± 0.024
1.532LysArg: 1.532 ± 0.038
1.258LysSer: 1.258 ± 0.03
1.331LysThr: 1.331 ± 0.038
2.003LysVal: 2.003 ± 0.037
0.264LysTrp: 0.264 ± 0.014
0.467LysTyr: 0.467 ± 0.018
0.001LysXaa: 0.001 ± 0.001
Leu
14.705LeuAla: 14.705 ± 0.12
0.815LeuCys: 0.815 ± 0.022
6.825LeuAsp: 6.825 ± 0.07
4.797LeuGlu: 4.797 ± 0.064
2.697LeuPhe: 2.697 ± 0.045
9.346LeuGly: 9.346 ± 0.09
2.268LeuHis: 2.268 ± 0.039
3.626LeuIle: 3.626 ± 0.051
2.16LeuLys: 2.16 ± 0.042
11.557LeuLeu: 11.557 ± 0.13
1.772LeuMet: 1.772 ± 0.037
1.761LeuAsn: 1.761 ± 0.031
6.462LeuPro: 6.462 ± 0.076
2.132LeuGln: 2.132 ± 0.039
8.41LeuArg: 8.41 ± 0.091
5.505LeuSer: 5.505 ± 0.07
6.91LeuThr: 6.91 ± 0.064
8.833LeuVal: 8.833 ± 0.083
1.308LeuTrp: 1.308 ± 0.031
1.863LeuTyr: 1.863 ± 0.036
0.0LeuXaa: 0.0 ± 0.0
Met
2.323MetAla: 2.323 ± 0.04
0.137MetCys: 0.137 ± 0.011
0.945MetAsp: 0.945 ± 0.024
0.819MetGlu: 0.819 ± 0.022
0.484MetPhe: 0.484 ± 0.019
1.353MetGly: 1.353 ± 0.033
0.35MetHis: 0.35 ± 0.016
0.745MetIle: 0.745 ± 0.021
0.477MetLys: 0.477 ± 0.017
1.718MetLeu: 1.718 ± 0.033
0.318MetMet: 0.318 ± 0.014
0.496MetAsn: 0.496 ± 0.018
1.121MetPro: 1.121 ± 0.027
0.463MetGln: 0.463 ± 0.019
1.422MetArg: 1.422 ± 0.03
1.342MetSer: 1.342 ± 0.033
1.596MetThr: 1.596 ± 0.032
1.334MetVal: 1.334 ± 0.029
0.195MetTrp: 0.195 ± 0.011
0.346MetTyr: 0.346 ± 0.017
0.0MetXaa: 0.0 ± 0.0
Asn
2.334AsnAla: 2.334 ± 0.04
0.159AsnCys: 0.159 ± 0.01
1.005AsnAsp: 1.005 ± 0.03
0.906AsnGlu: 0.906 ± 0.026
0.51AsnPhe: 0.51 ± 0.017
1.979AsnGly: 1.979 ± 0.04
0.382AsnHis: 0.382 ± 0.015
0.682AsnIle: 0.682 ± 0.023
0.464AsnLys: 0.464 ± 0.016
1.683AsnLeu: 1.683 ± 0.036
0.349AsnMet: 0.349 ± 0.014
0.46AsnAsn: 0.46 ± 0.02
1.337AsnPro: 1.337 ± 0.031
0.525AsnGln: 0.525 ± 0.018
1.312AsnArg: 1.312 ± 0.029
0.96AsnSer: 0.96 ± 0.028
1.163AsnThr: 1.163 ± 0.03
1.407AsnVal: 1.407 ± 0.033
0.274AsnTrp: 0.274 ± 0.014
0.427AsnTyr: 0.427 ± 0.016
0.0AsnXaa: 0.0 ± 0.0
Pro
8.096ProAla: 8.096 ± 0.085
0.326ProCys: 0.326 ± 0.016
4.448ProAsp: 4.448 ± 0.059
4.532ProGlu: 4.532 ± 0.056
1.571ProPhe: 1.571 ± 0.029
6.512ProGly: 6.512 ± 0.073
1.257ProHis: 1.257 ± 0.03
1.278ProIle: 1.278 ± 0.031
1.302ProLys: 1.302 ± 0.031
5.26ProLeu: 5.26 ± 0.063
1.091ProMet: 1.091 ± 0.025
0.876ProAsn: 0.876 ± 0.024
3.267ProPro: 3.267 ± 0.064
1.622ProGln: 1.622 ± 0.038
3.634ProArg: 3.634 ± 0.054
3.103ProSer: 3.103 ± 0.05
3.02ProThr: 3.02 ± 0.045
5.518ProVal: 5.518 ± 0.058
0.82ProTrp: 0.82 ± 0.025
1.42ProTyr: 1.42 ± 0.035
0.0ProXaa: 0.0 ± 0.0
Gln
3.533GlnAla: 3.533 ± 0.051
0.163GlnCys: 0.163 ± 0.012
1.415GlnAsp: 1.415 ± 0.036
1.551GlnGlu: 1.551 ± 0.034
0.671GlnPhe: 0.671 ± 0.02
2.222GlnGly: 2.222 ± 0.044
0.644GlnHis: 0.644 ± 0.023
1.113GlnIle: 1.113 ± 0.026
0.662GlnLys: 0.662 ± 0.019
3.033GlnLeu: 3.033 ± 0.045
0.512GlnMet: 0.512 ± 0.018
0.535GlnAsn: 0.535 ± 0.019
1.59GlnPro: 1.59 ± 0.041
1.339GlnGln: 1.339 ± 0.049
2.324GlnArg: 2.324 ± 0.039
1.21GlnSer: 1.21 ± 0.029
1.294GlnThr: 1.294 ± 0.031
2.328GlnVal: 2.328 ± 0.042
0.463GlnTrp: 0.463 ± 0.017
0.604GlnTyr: 0.604 ± 0.021
0.0GlnXaa: 0.0 ± 0.0
Arg
9.448ArgAla: 9.448 ± 0.103
0.582ArgCys: 0.582 ± 0.021
4.247ArgAsp: 4.247 ± 0.056
4.76ArgGlu: 4.76 ± 0.062
2.326ArgPhe: 2.326 ± 0.036
5.657ArgGly: 5.657 ± 0.066
2.033ArgHis: 2.033 ± 0.043
3.466ArgIle: 3.466 ± 0.05
1.745ArgLys: 1.745 ± 0.038
8.501ArgLeu: 8.501 ± 0.084
1.742ArgMet: 1.742 ± 0.033
1.412ArgAsn: 1.412 ± 0.033
4.688ArgPro: 4.688 ± 0.074
2.164ArgGln: 2.164 ± 0.043
7.243ArgArg: 7.243 ± 0.093
4.303ArgSer: 4.303 ± 0.046
5.576ArgThr: 5.576 ± 0.073
5.504ArgVal: 5.504 ± 0.066
1.277ArgTrp: 1.277 ± 0.031
1.72ArgTyr: 1.72 ± 0.029
0.0ArgXaa: 0.0 ± 0.0
Ser
6.881SerAla: 6.881 ± 0.078
0.449SerCys: 0.449 ± 0.018
2.71SerAsp: 2.71 ± 0.048
2.469SerGlu: 2.469 ± 0.042
1.557SerPhe: 1.557 ± 0.032
6.196SerGly: 6.196 ± 0.07
0.993SerHis: 0.993 ± 0.026
1.637SerIle: 1.637 ± 0.036
1.124SerLys: 1.124 ± 0.029
4.984SerLeu: 4.984 ± 0.064
1.056SerMet: 1.056 ± 0.029
0.881SerAsn: 0.881 ± 0.029
3.13SerPro: 3.13 ± 0.048
1.219SerGln: 1.219 ± 0.031
3.7SerArg: 3.7 ± 0.049
2.954SerSer: 2.954 ± 0.059
3.151SerThr: 3.151 ± 0.047
4.415SerVal: 4.415 ± 0.055
0.913SerTrp: 0.913 ± 0.022
1.211SerTyr: 1.211 ± 0.031
0.0SerXaa: 0.0 ± 0.0
Thr
8.81ThrAla: 8.81 ± 0.079
0.392ThrCys: 0.392 ± 0.018
3.621ThrAsp: 3.621 ± 0.046
3.441ThrGlu: 3.441 ± 0.05
1.633ThrPhe: 1.633 ± 0.036
6.752ThrGly: 6.752 ± 0.068
1.169ThrHis: 1.169 ± 0.03
1.79ThrIle: 1.79 ± 0.038
1.219ThrLys: 1.219 ± 0.033
5.777ThrLeu: 5.777 ± 0.068
0.949ThrMet: 0.949 ± 0.025
1.0ThrAsn: 1.0 ± 0.027
3.975ThrPro: 3.975 ± 0.049
1.277ThrGln: 1.277 ± 0.03
3.797ThrArg: 3.797 ± 0.057
3.13ThrSer: 3.13 ± 0.047
3.888ThrThr: 3.888 ± 0.066
6.173ThrVal: 6.173 ± 0.065
0.865ThrTrp: 0.865 ± 0.026
1.358ThrTyr: 1.358 ± 0.032
0.0ThrXaa: 0.0 ± 0.0
Val
10.676ValAla: 10.676 ± 0.091
0.762ValCys: 0.762 ± 0.022
4.877ValAsp: 4.877 ± 0.062
4.848ValGlu: 4.848 ± 0.067
2.486ValPhe: 2.486 ± 0.045
6.401ValGly: 6.401 ± 0.069
1.941ValHis: 1.941 ± 0.037
3.035ValIle: 3.035 ± 0.042
1.881ValLys: 1.881 ± 0.037
9.554ValLeu: 9.554 ± 0.096
1.503ValMet: 1.503 ± 0.03
1.66ValAsn: 1.66 ± 0.035
4.99ValPro: 4.99 ± 0.064
2.069ValGln: 2.069 ± 0.035
6.994ValArg: 6.994 ± 0.071
4.432ValSer: 4.432 ± 0.062
5.502ValThr: 5.502 ± 0.065
7.914ValVal: 7.914 ± 0.074
1.125ValTrp: 1.125 ± 0.028
1.56ValTyr: 1.56 ± 0.03
0.0ValXaa: 0.0 ± 0.0
Trp
1.61TrpAla: 1.61 ± 0.033
0.16TrpCys: 0.16 ± 0.01
0.81TrpAsp: 0.81 ± 0.023
0.714TrpGlu: 0.714 ± 0.024
0.518TrpPhe: 0.518 ± 0.016
0.971TrpGly: 0.971 ± 0.026
0.335TrpHis: 0.335 ± 0.013
0.571TrpIle: 0.571 ± 0.02
0.393TrpLys: 0.393 ± 0.018
1.663TrpLeu: 1.663 ± 0.035
0.305TrpMet: 0.305 ± 0.013
0.406TrpAsn: 0.406 ± 0.017
0.74TrpPro: 0.74 ± 0.025
0.63TrpGln: 0.63 ± 0.019
1.243TrpArg: 1.243 ± 0.028
0.946TrpSer: 0.946 ± 0.024
0.99TrpThr: 0.99 ± 0.026
0.944TrpVal: 0.944 ± 0.026
0.298TrpTrp: 0.298 ± 0.016
0.357TrpTyr: 0.357 ± 0.015
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.793TyrAla: 2.793 ± 0.038
0.182TyrCys: 0.182 ± 0.011
1.453TyrAsp: 1.453 ± 0.035
1.296TyrGlu: 1.296 ± 0.029
0.655TyrPhe: 0.655 ± 0.021
2.341TyrGly: 2.341 ± 0.048
0.387TyrHis: 0.387 ± 0.016
0.539TyrIle: 0.539 ± 0.021
0.432TyrLys: 0.432 ± 0.018
2.094TyrLeu: 2.094 ± 0.033
0.261TyrMet: 0.261 ± 0.016
0.412TyrAsn: 0.412 ± 0.017
1.023TyrPro: 1.023 ± 0.031
0.577TyrGln: 0.577 ± 0.019
1.817TyrArg: 1.817 ± 0.032
0.949TyrSer: 0.949 ± 0.029
1.192TyrThr: 1.192 ± 0.029
1.657TyrVal: 1.657 ± 0.038
0.35TyrTrp: 0.35 ± 0.014
0.426TyrTyr: 0.426 ± 0.018
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
0.001XaaLys: 0.001 ± 0.001
0.0XaaLeu: 0.0 ± 0.0
0.0XaaMet: 0.0 ± 0.0
0.0XaaAsn: 0.0 ± 0.0
0.001XaaPro: 0.001 ± 0.001
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 6148 proteins (1545259 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