Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5718
Number of amino acids:325
Molecular Weight:35626.65 Da
Theoretical pI:9.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)278.31%
Cysteine CYS (C)92.77%
Glutamic Acid GLU (E)82.46%
Aspartic Acid ASP (D)206.15%
Glycine GLY (G)237.08%
Phynylalanine PHE (F)164.92%
Isoleucine ILE (I)175.23%
Histidine HIS (H)30.92%
Lysine LYS (K)61.85%
Methionine MET (M)72.15%
Leucine LEU (L)329.85%
Asparagine ASN (N)164.92%
Glutamine GLN (Q)113.38%
Proline PRO (P)123.69%
Serine SER (S)3611.08%
Arginine ARG (R)3310.15%
Threonine THR (T)175.23%
Tryptophan TRP (W)10.31%
Valine VAL (V)247.38%
Tyrosine TYR (Y)72.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1548
HydrogenH2498
NitrogenN464
OxygenO469
SulphurS16

FormulaC1548H2498N464O469S16
Total Number of Atoms:4995


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):28
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    16430
Absorption 0.1% (=1 g/l)    0.461,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15930
Absorption 0.1% (=1 g/l)    0.447,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 52.61

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.85, 26.77, 22.77]

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:88.5231
Grand average of hydropathicity (GRAVY):-0.08