Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3949
Number of amino acids:93
Molecular Weight:9436.7 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)99.68%
Cysteine CYS (C)88.6%
Glutamic Acid GLU (E)11.08%
Aspartic Acid ASP (D)33.23%
Glycine GLY (G)66.45%
Phynylalanine PHE (F)22.15%
Isoleucine ILE (I)44.3%
Histidine HIS (H)00%
Lysine LYS (K)44.3%
Methionine MET (M)33.23%
Leucine LEU (L)44.3%
Asparagine ASN (N)66.45%
Glutamine GLN (Q)00%
Proline PRO (P)44.3%
Serine SER (S)2223.66%
Arginine ARG (R)55.38%
Threonine THR (T)44.3%
Tryptophan TRP (W)00%
Valine VAL (V)77.53%
Tyrosine TYR (Y)11.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC385
HydrogenH642
NitrogenN118
OxygenO135
SulphurS11

FormulaC385H642N118O135S11
Total Number of Atoms:1291


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):4
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    1990
Absorption 0.1% (=1 g/l)    0.211,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.158,   assuming all CYS residues are reduced
Aromaticity:0.032

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 57.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[19.35, 40.86, 18.28]

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:65.0538
Grand average of hydropathicity (GRAVY):0.07