Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5051
Number of amino acids:348
Molecular Weight:37460.11 Da
Theoretical pI:4.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)226.32%
Cysteine CYS (C)92.59%
Glutamic Acid GLU (E)216.03%
Aspartic Acid ASP (D)216.03%
Glycine GLY (G)298.33%
Phynylalanine PHE (F)195.46%
Isoleucine ILE (I)133.74%
Histidine HIS (H)41.15%
Lysine LYS (K)92.59%
Methionine MET (M)92.59%
Leucine LEU (L)3710.63%
Asparagine ASN (N)195.46%
Glutamine GLN (Q)133.74%
Proline PRO (P)174.89%
Serine SER (S)3710.63%
Arginine ARG (R)133.74%
Threonine THR (T)246.9%
Tryptophan TRP (W)20.57%
Valine VAL (V)257.18%
Tyrosine TYR (Y)51.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1637
HydrogenH2570
NitrogenN438
OxygenO531
SulphurS18

FormulaC1637H2570N438O531S18
Total Number of Atoms:5194


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18950
Absorption 0.1% (=1 g/l)    0.506,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    0.493,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.55

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.02, 29.31, 25.57]

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:83.1897
Grand average of hydropathicity (GRAVY):-0.06