Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4371
Number of amino acids:323
Molecular Weight:35831.96 Da
Theoretical pI:9.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)278.36%
Cysteine CYS (C)82.48%
Glutamic Acid GLU (E)61.86%
Aspartic Acid ASP (D)216.5%
Glycine GLY (G)175.26%
Phynylalanine PHE (F)237.12%
Isoleucine ILE (I)164.95%
Histidine HIS (H)61.86%
Lysine LYS (K)164.95%
Methionine MET (M)61.86%
Leucine LEU (L)288.67%
Asparagine ASN (N)175.26%
Glutamine GLN (Q)164.95%
Proline PRO (P)154.64%
Serine SER (S)309.29%
Arginine ARG (R)257.74%
Threonine THR (T)206.19%
Tryptophan TRP (W)00%
Valine VAL (V)216.5%
Tyrosine TYR (Y)51.55%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1579
HydrogenH2513
NitrogenN459
OxygenO466
SulphurS14

FormulaC1579H2513N459O466S14
Total Number of Atoms:5031


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):27
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7950
Absorption 0.1% (=1 g/l)    0.222,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    0.208,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.10

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.79, 24.46, 20.74]

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:80.3406
Grand average of hydropathicity (GRAVY):-0.21