Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4643
Number of amino acids:867
Molecular Weight:98151.75 Da
Theoretical pI:6.82


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)515.88%
Cysteine CYS (C)40.46%
Glutamic Acid GLU (E)526%
Aspartic Acid ASP (D)384.38%
Glycine GLY (G)495.65%
Phynylalanine PHE (F)495.65%
Isoleucine ILE (I)515.88%
Histidine HIS (H)232.65%
Lysine LYS (K)343.92%
Methionine MET (M)273.11%
Leucine LEU (L)10011.53%
Asparagine ASN (N)414.73%
Glutamine GLN (Q)263%
Proline PRO (P)252.88%
Serine SER (S)839.57%
Arginine ARG (R)536.11%
Threonine THR (T)556.34%
Tryptophan TRP (W)182.08%
Valine VAL (V)687.84%
Tyrosine TYR (Y)202.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4423
HydrogenH6929
NitrogenN1191
OxygenO1273
SulphurS31

FormulaC4423H6929N1191O1273S31
Total Number of Atoms:13847


Total number of positively charged residues (ARG + LYS):87
Total number of negatively charged residues (ASP + GLU):90
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    129050
Absorption 0.1% (=1 g/l)    1.315,   assuming all pairs of CYS residues form cystines

Ext. coefficient    128800
Absorption 0.1% (=1 g/l)    1.312,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.63

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.29, 22.84, 26.53]

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:96.5512
Grand average of hydropathicity (GRAVY):-0.02