Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5409
Number of amino acids:172
Molecular Weight:20114.26 Da
Theoretical pI:5.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)116.4%
Cysteine CYS (C)84.65%
Glutamic Acid GLU (E)148.14%
Aspartic Acid ASP (D)126.98%
Glycine GLY (G)84.65%
Phynylalanine PHE (F)31.74%
Isoleucine ILE (I)31.74%
Histidine HIS (H)31.74%
Lysine LYS (K)31.74%
Methionine MET (M)42.33%
Leucine LEU (L)179.88%
Asparagine ASN (N)74.07%
Glutamine GLN (Q)2413.95%
Proline PRO (P)116.4%
Serine SER (S)137.56%
Arginine ARG (R)2112.21%
Threonine THR (T)10.58%
Tryptophan TRP (W)10.58%
Valine VAL (V)21.16%
Tyrosine TYR (Y)63.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC841
HydrogenH1336
NitrogenN276
OxygenO276
SulphurS12

FormulaC841H1336N276O276S12
Total Number of Atoms:2741


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14940
Absorption 0.1% (=1 g/l)    0.743,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.718,   assuming all CYS residues are reduced
Aromaticity:0.058

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 74.13

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.60, 22.67, 26.74]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:55.1163
Grand average of hydropathicity (GRAVY):-1.24