Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4445
Number of amino acids:403
Molecular Weight:43448.42 Da
Theoretical pI:6.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)379.18%
Cysteine CYS (C)30.74%
Glutamic Acid GLU (E)122.98%
Aspartic Acid ASP (D)307.44%
Glycine GLY (G)245.96%
Phynylalanine PHE (F)163.97%
Isoleucine ILE (I)225.46%
Histidine HIS (H)92.23%
Lysine LYS (K)297.2%
Methionine MET (M)92.23%
Leucine LEU (L)389.43%
Asparagine ASN (N)184.47%
Glutamine GLN (Q)133.23%
Proline PRO (P)163.97%
Serine SER (S)389.43%
Arginine ARG (R)92.23%
Threonine THR (T)358.68%
Tryptophan TRP (W)10.25%
Valine VAL (V)327.94%
Tyrosine TYR (Y)122.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1929
HydrogenH3077
NitrogenN509
OxygenO604
SulphurS12

FormulaC1929H3077N509O604S12
Total Number of Atoms:6131


Total number of positively charged residues (ARG + LYS):38
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    23505
Absorption 0.1% (=1 g/l)    0.541,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.538,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.59

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.02, 23.82, 23.82]

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:90.273
Grand average of hydropathicity (GRAVY):-0.08