Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5415
Number of amino acids:302
Molecular Weight:34316.51 Da
Theoretical pI:7.25


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)175.63%
Cysteine CYS (C)92.98%
Glutamic Acid GLU (E)237.62%
Aspartic Acid ASP (D)113.64%
Glycine GLY (G)123.97%
Phynylalanine PHE (F)154.97%
Isoleucine ILE (I)154.97%
Histidine HIS (H)82.65%
Lysine LYS (K)123.97%
Methionine MET (M)82.65%
Leucine LEU (L)3712.25%
Asparagine ASN (N)82.65%
Glutamine GLN (Q)154.97%
Proline PRO (P)134.3%
Serine SER (S)309.93%
Arginine ARG (R)227.28%
Threonine THR (T)196.29%
Tryptophan TRP (W)20.66%
Valine VAL (V)196.29%
Tyrosine TYR (Y)72.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1518
HydrogenH2423
NitrogenN421
OxygenO450
SulphurS17

FormulaC1518H2423N421O450S17
Total Number of Atoms:4829


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):34
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    21930
Absorption 0.1% (=1 g/l)    0.639,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21430
Absorption 0.1% (=1 g/l)    0.624,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 53.97

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.46, 20.86, 28.15]

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:91.0267
Grand average of hydropathicity (GRAVY):-0.15