Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5744
Number of amino acids:295
Molecular Weight:34071.32 Da
Theoretical pI:8.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)144.75%
Cysteine CYS (C)165.42%
Glutamic Acid GLU (E)217.12%
Aspartic Acid ASP (D)51.69%
Glycine GLY (G)175.76%
Phynylalanine PHE (F)103.39%
Isoleucine ILE (I)165.42%
Histidine HIS (H)20.68%
Lysine LYS (K)51.69%
Methionine MET (M)62.03%
Leucine LEU (L)155.08%
Asparagine ASN (N)124.07%
Glutamine GLN (Q)7124.07%
Proline PRO (P)134.41%
Serine SER (S)82.71%
Arginine ARG (R)289.49%
Threonine THR (T)196.44%
Tryptophan TRP (W)00%
Valine VAL (V)165.42%
Tyrosine TYR (Y)10.34%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1422
HydrogenH2327
NitrogenN471
OxygenO459
SulphurS22

FormulaC1422H2327N471O459S22
Total Number of Atoms:4701


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    2490
Absorption 0.1% (=1 g/l)    0.073,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.044,   assuming all CYS residues are reduced
Aromaticity:0.037

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 78.95

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[19.66, 16.95, 18.98]

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:61.4576
Grand average of hydropathicity (GRAVY):-0.95