Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4977
Number of amino acids:324
Molecular Weight:34673.87 Da
Theoretical pI:4.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)268.02%
Cysteine CYS (C)82.47%
Glutamic Acid GLU (E)61.85%
Aspartic Acid ASP (D)268.02%
Glycine GLY (G)319.57%
Phynylalanine PHE (F)237.1%
Isoleucine ILE (I)195.86%
Histidine HIS (H)30.93%
Lysine LYS (K)82.47%
Methionine MET (M)51.54%
Leucine LEU (L)288.64%
Asparagine ASN (N)237.1%
Glutamine GLN (Q)175.25%
Proline PRO (P)113.4%
Serine SER (S)237.1%
Arginine ARG (R)144.32%
Threonine THR (T)298.95%
Tryptophan TRP (W)10.31%
Valine VAL (V)206.17%
Tyrosine TYR (Y)30.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1517
HydrogenH2377
NitrogenN421
OxygenO484
SulphurS13

FormulaC1517H2377N421O484S13
Total Number of Atoms:4812


Total number of positively charged residues (ARG + LYS):22
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    10470
Absorption 0.1% (=1 g/l)    0.302,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.288,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.01, 27.16, 20.06]

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:82.5
Grand average of hydropathicity (GRAVY):-0.04