Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4589
Number of amino acids:312
Molecular Weight:34153.61 Da
Theoretical pI:7.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)258.01%
Cysteine CYS (C)41.28%
Glutamic Acid GLU (E)165.13%
Aspartic Acid ASP (D)165.13%
Glycine GLY (G)216.73%
Phynylalanine PHE (F)185.77%
Isoleucine ILE (I)134.17%
Histidine HIS (H)30.96%
Lysine LYS (K)227.05%
Methionine MET (M)61.92%
Leucine LEU (L)258.01%
Asparagine ASN (N)206.41%
Glutamine GLN (Q)72.24%
Proline PRO (P)144.49%
Serine SER (S)3611.54%
Arginine ARG (R)103.21%
Threonine THR (T)175.45%
Tryptophan TRP (W)41.28%
Valine VAL (V)247.69%
Tyrosine TYR (Y)113.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1527
HydrogenH2369
NitrogenN401
OxygenO468
SulphurS10

FormulaC1527H2369N401O468S10
Total Number of Atoms:4775


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    38640
Absorption 0.1% (=1 g/l)    1.131,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38390
Absorption 0.1% (=1 g/l)    1.124,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.97

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.45, 29.17, 23.08]

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:77.8205
Grand average of hydropathicity (GRAVY):-0.21