Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5474
Number of amino acids:336
Molecular Weight:37426.72 Da
Theoretical pI:8.74


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)267.74%
Cysteine CYS (C)102.98%
Glutamic Acid GLU (E)175.06%
Aspartic Acid ASP (D)164.76%
Glycine GLY (G)226.55%
Phynylalanine PHE (F)216.25%
Isoleucine ILE (I)205.95%
Histidine HIS (H)72.08%
Lysine LYS (K)195.65%
Methionine MET (M)61.79%
Leucine LEU (L)3510.42%
Asparagine ASN (N)175.06%
Glutamine GLN (Q)154.46%
Proline PRO (P)154.46%
Serine SER (S)339.82%
Arginine ARG (R)205.95%
Threonine THR (T)154.46%
Tryptophan TRP (W)10.3%
Valine VAL (V)113.27%
Tyrosine TYR (Y)102.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1659
HydrogenH2608
NitrogenN462
OxygenO493
SulphurS16

FormulaC1659H2608N462O493S16
Total Number of Atoms:5238


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):33
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    21025
Absorption 0.1% (=1 g/l)    0.562,   assuming all pairs of CYS residues form cystines

Ext. coefficient    20400
Absorption 0.1% (=1 g/l)    0.545,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.48

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.17, 25.89, 25.00]

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:81.0716
Grand average of hydropathicity (GRAVY):-0.26